{"title":"Zesto Audio","description":"","products":[{"product_id":"zesto-audio-eros-300-monoblock-poweramps-pair","title":"Zesto Audio Eros 300 Monoblock Poweramps (pair) (OPEN)","description":"\u003ch1\u003eZesto Audio Eros 300 Mono Power Amplifiers (pair)\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003eConservatively rated at 150 W into 4 and 8 Ohms, the Zesto 300 features pure Class-A circuitry and uses six KT-88's per monoblock. The amplifiers belie their rated power and drive low-efficiency loudspeakers to satisfying levels with ease. There is no sonic mystery that these are tube amplifiers; tonal colors are rich and full-bodied with a life-like warmth that never devolves into softness or syrup. If anything, the amplifiers are supremely transparent and reveal an amazing amount of musical detail regardless of source.\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— THE ABSOLUTE SOUND\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/download_56269d02-590a-40f4-a30e-6a3c810b2413_compact.png?v=1550689084\" style=\"margin-right: 4px; float: none;\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDesign Philosophy\u003c\/h3\u003e\n\u003cp\u003eThe challenge designing the Eros 300 was the conflict created when you want a lot of power, low noise and most importantly you want it to be musical. It took over 3 years to develop the Eros and 79 circuit designs later. I always look at the design from two points of view, as an audio engineer and an electrical perspective. Each design phase is based on a 50\/50 balance between the technical spec and listening to each component change.  Ultimately, the final design must sound good because who listens to sign waves anyway.\u003c\/p\u003e\n\u003ch4\u003eClass A amplifier design\u003c\/h4\u003e\n\u003cp\u003eClass A has less cross-over distortion and therefore is more musical. The tubes are always on, so you have power when you need it. Class A is fast and responsive. There is no lag, providing your music more punch, transient response, better dynamic range and transparency.\u003c\/p\u003e\n\u003ch4\u003eSecret Sauce\u003c\/h4\u003e\n\u003cp\u003eThe secret to a good power amplifier design is matching the circuits of the power supply to the amplifier. The Eros 300 is a choke based power supply with a custom toroid power transformer that gives you maximum power with no compression. It’s the most musical design because it retains all the dynamics from your sound source.\u003c\/p\u003e\n\u003ch4\u003eLots of choices\u003c\/h4\u003e\n\u003cp\u003eHow many tubes is enough? How much power is enough? I decided that 6 KT88’s and 150 Watts of Class A power was a good balance. More tubes and more power didn’t actually sound better, in fact, worse. Adding more tubes would have created more heat and less reliability.\u003c\/p\u003e\n\u003ch4\u003eWhat is EROS?\u003c\/h4\u003e\n\u003cp\u003eIn Greek mythology, EROS is the God of Love and Desire.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eClass A topology is the most musical of all amplifier designs because it has the lowest distortion.\u003c\/li\u003e\n\u003cli\u003eUnlike solid state, this tube amp efficiently transfers power by matching the output transformer to the impedance of your speakers using 4 \u0026amp; 8 Ohm taps.\u003c\/li\u003e\n\u003cli\u003eTwo parallel options for your speaker cables; the binding posts or the SpeakOn connector.\u003c\/li\u003e\n\u003cli\u003eThe Eros 300 is easy to use. There are no adjustments or tweaking with Auto Bias technology on the output tubes. It’s safe, consistent and the settings are always perfect so you can relax and enjoy the music.\u003c\/li\u003e\n\u003cli\u003eTransformer balanced XLR input offers true noise cancelling and rejection as well as ground isolation from the preamp.\u003c\/li\u003e\n\u003cli\u003eShould you need to eliminate a hum? The Eros 300 has a XLR ground switch installed for your safety. This eliminates the dangerous temptation to lift the ground from the mains.\u003c\/li\u003e\n\u003cli\u003eThe combo of Push-Pull – Ultra Linear output circuit design gives you more power \u0026amp; lower distortion.\u003c\/li\u003e\n\u003cli\u003eNo Negative Feedback in the circuit design provides better dynamic range because it doesn’t compress the music.\u003c\/li\u003e\n\u003cli\u003eNon Inverting Phase Polarity retains the directional information from the original source which gives your system punch.\u003c\/li\u003e\n\u003cli\u003eA robust choke based power supply creates maximum immediate power with no compression.\u003c\/li\u003e\n\u003cli\u003eCustom Toroid power transformer provides lower noise with plenty of available power.\u003c\/li\u003e\n\u003cli\u003eThe circuit design creates low noise levels with a wide frequency response. You will notice this in the really dark, quiet passages in your music.\u003c\/li\u003e\n\u003cli\u003eGold pin sockets are more reliable because gold doesn’t oxidize when it heat cycles.\u003c\/li\u003e\n\u003cli\u003eA matched sextet (6) output tubes provides a synchronized balance for the lowest distortion and maximum output of power.\u003c\/li\u003e\n\u003cli\u003eAn extensive grounding scheme is designed into the power supply, wiring and all tube circuitry.\u003c\/li\u003e\n\u003cli\u003eElegantly designed, heavy duty 14 \u0026amp; 16 gauge zinc plated, fully grounded steel enclosure isolates external noise and vibration.\u003c\/li\u003e\n\u003cli\u003eAll fuses are easily accessible\u003c\/li\u003e\n\u003cli\u003eIt’s ready to enjoy with 50 hours of factory burn in on all circuits and vacuum tubes.\u003c\/li\u003e\n\u003cli\u003eEach unit is hand built “Made in the USA”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecifications per Amp\u003c\/h3\u003e\n\u003ch4\u003eOutput\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePure Class A\u003c\/li\u003e\n\u003cli\u003e150 Watts per amp\u003c\/li\u003e\n\u003cli\u003e4 and 8 Ohm output taps\u003c\/li\u003e\n\u003cli\u003e8 and 5 Amp Slow blow fuses for outputs\u003c\/li\u003e\n\u003cli\u003eThree 5 way binding post\u003c\/li\u003e\n\u003cli\u003eOne SpeakOn connector\u003c\/li\u003e\n\u003cli\u003eNon inverting output phase polarity\u003c\/li\u003e\n\u003cli\u003ePush-Pull and Ultra-Linear design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInputs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTransformer floating XLR input\u003c\/li\u003e\n\u003cli\u003eBalanced inputs with pin 2 hot, impedance of 12K Ohms\u003c\/li\u003e\n\u003cli\u003eSingle Ended input, impedance of 100K Ohms\u003c\/li\u003e\n\u003cli\u003eXLR ground lift switch on balanced input\u003c\/li\u003e\n\u003cli\u003e1.8 Volts RMS input to reach rated output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eDetailed Specs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMonaural\u003c\/li\u003e\n\u003cli\u003eAuto bias\u003c\/li\u003e\n\u003cli\u003eNo negative feedback\u003c\/li\u003e\n\u003cli\u003eFrequency response: 20Hz to 50Khz ~ 2db\u003c\/li\u003e\n\u003cli\u003eTotal Harmonic Distortion: ~ 0.43% at 1W output into 8 Ohms\u003c\/li\u003e\n\u003cli\u003eGain of 26dB\u003c\/li\u003e\n\u003cli\u003eNoise level \u0026gt; 5 mV RMS into 8 Ohms with input shorted\u003c\/li\u003e\n\u003cli\u003e1% metal film resisters throughout\u003c\/li\u003e\n\u003cli\u003ePolypropylene capacitors throughout the audio path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003ePower\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCustom Toroidal power transformer with global mains\u003c\/li\u003e\n\u003cli\u003eChoke based power supply design\u003c\/li\u003e\n\u003cli\u003e120 Volts AC mains\u003c\/li\u003e\n\u003cli\u003eOptional factory installed 220V, 230V, 240V 50\/60Hz\u003c\/li\u003e\n\u003cli\u003ePower consumption at rated output: 360 Watts\u003c\/li\u003e\n\u003cli\u003ePower consumption at idle: 348 Watts\u003c\/li\u003e\n\u003cli\u003eOn\/Off switch conveniently located on front panel\u003c\/li\u003e\n\u003cli\u003e3 pin IEC power connector with fuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eActive Components\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMatched sextet, set of six (6) KT88’s vacuum tubes\u003c\/li\u003e\n\u003cli\u003eTwo (2) Gold pin ECC82s (12AU7) vacuum tubes\u003c\/li\u003e\n\u003cli\u003eHigh quality gold pin ceramic sockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eOther Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEach unit is made by hand\u003c\/li\u003e\n\u003cli\u003e50 hour factory burn in on all circuits and vacuum tubes\u003c\/li\u003e\n\u003cli\u003eDimensions: 17″ W X 20″ D X 10 ” H\u003c\/li\u003e\n\u003cli\u003eWeight: 64 lb (29.03 kg)\u003c\/li\u003e\n\u003cli\u003eShipping weight: 80 lb (36.28 kg)\u003c\/li\u003e\n\u003cli\u003e14 and 16 gauge zinc-plated steel enclosure\u003c\/li\u003e\n\u003cli\u003eTwo year limited warranty\u003c\/li\u003e\n\u003cli\u003eSix month warranty on vacuum tubes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":31857678288,"sku":"ZA EROS 300 OPEN","price":19601.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/products\/eros-300-croped.jpg?v=1741632280"},{"product_id":"zesto-audio-andros-allasso-step-up-transformer","title":"Zesto Audio Andros Allasso Step Up Transformer","description":"\u003ch1\u003eZesto Audio Andros Allasso Step-Up Transformer\u003c\/h1\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/ZqM4rc6pMzU?rel=0\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003eThe Allasso is the step-up transformer for the ultimate audiophile who loves his phono cartridges. With features way beyond the competition, a neutral extremely detailed sound, and gorgeous depth of field, the Allasso is a triumph of American engineering.\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— POSITIVE FEEDBACK WRITERS' CHOICE AWARD 2018\u003c\/figcaption\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003e…”Zesto’s George Counnas designed the Allasso (Greek for change or transform) to be both incredibly flexible and easy to use… Best of all, rather than overload your primary and secondary coils, Counnas says that “it’s about the best sound, not the math.” He suggests beginning with the middle load position (5). I’d still use math to set the gain, based on the cartridge’s output, but you’re free to experiment while listening. Turning the Andros Allasso’s knobs produced no thumps or bumps through my speakers….”\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— MICHAEL FREMER, STEREOPHILE\u003c\/figcaption\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003eThe big advantage of the Allasso, in addition to its amazing sonics which are not to be underestimated, is its flexibility to dial in settings specifically tailored to your cartridge\/phono stage needs, without the downside of being locked into a narrow range of cartridges moving forward. Because of this, it's not hype to say that if you like what you hear with Allasso as much as I do it might just be the last step up transformer you'll ever need.\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— MICHAEL CORSENTINO, POSITIVE FEEDBACK\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003c\/figure\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat to know about the Allasso Step Up Transformer\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cem\u003e“You are now free to roam the cartridge planet”!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003e3 Reasons You May Want a Step up Transformer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou own a very low or very high output MC cartridge.\u003c\/li\u003e\n\u003cli\u003eYour cartridge Loading\/Gain is difficult to match on your current system.\u003c\/li\u003e\n\u003cli\u003eYou own more MC cartridges than MM and don’t want to buy another phonostage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eWhy You Need a Phonostage with a Step up Transformer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA step up transformer does not have the RIAA curve equalizer. It doesn’t have power either. It goes between your turntable and your phono preamp.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy a Phonostage is So Important\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen a vinyl record is made the volume of the bass is reduced and the treble is increased. Otherwise, the bass would cut a groove too big for a stylus to read or for the music to fit the record. The phonostage reverses the process by taking the delicate signal from your cartridge and adjusting it so that the bass and treble are restored to their original volume. This common standard is known as the RIAA curve.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eWorks on Any Phonostage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Allasso is extremely versatile. It will work with any standard phonostage with a 47K MM input.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Does a Step up Transformer do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt amplifies the delicate signal from your MC cartridge. An MM cartridge has a higher output than MC, so a MC needs to have a different step up ratios\/gain to reach the same output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eYou Have Lots of Choices\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou now have 40 options in Stereo and 40 options in Mono. It has enough adjustments to tailor it specifically to your cartridge or your next one. It’s just you and your ears, no math skills required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eWhat is Allasso?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAllasso in Greek means to change or transform one thing to another.\u003c\/p\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFrequency response -3dB at 0.4Hz to 100 KHz\u003c\/li\u003e\n\u003cli\u003ePhase deviation 1° typical at 20Hz\u003c\/li\u003e\n\u003cli\u003eTransformer noise 2 dB @ 20 Ω, 1.8 dB @ 12 Ω\u003c\/li\u003e\n\u003cli\u003eHum rejection                 125 dB @ 60 Hz\u003c\/li\u003e\n\u003cli\u003eVoltage gain                 12dB, 16dB, 18dB and 22dB\u003c\/li\u003e\n\u003cli\u003eStep up ratios                  1:4,    1:6,    1:8 and 1:12\u003c\/li\u003e\n\u003cli\u003eMC load 40 positions in Mono, 40 positions in Stereo\u003c\/li\u003e\n\u003cli\u003eRecommended output load 47KΩ @ 200pF (MM input)\u003c\/li\u003e\n\u003cli\u003eInputs Balanced and Single Ended MC\u003c\/li\u003e\n\u003cli\u003eOutputs Single Ended\u003c\/li\u003e\n\u003cli\u003eGrounds Independent input ground-lift switches\u003c\/li\u003e\n\u003cli\u003eGrounds Two ground binding posts\u003c\/li\u003e\n\u003cli\u003eMono Takes one input and sends it to both outputs\u003c\/li\u003e\n\u003cli\u003eDimensions 4”H X 6”W X 8”L (101.6mm X 152.4mm X 203.2mm)\u003c\/li\u003e\n\u003cli\u003eWeight 5lb (2.27Kg)\u003c\/li\u003e\n\u003cli\u003eShipping weight 8lb (3.63Kg)\u003c\/li\u003e\n\u003cli\u003eBox dimensions 7”H X 9”W X 13”L (177.9mm X 228.6g X 330.2g)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGain, Ratio and MC Loading Chart\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"379\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"99\"\u003eGain\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e12db\u003c\/td\u003e\n\u003ctd width=\"88\"\u003e16db\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e18db\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e22db\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRatio\u003c\/td\u003e\n\u003ctd\u003e1:4\u003c\/td\u003e\n\u003ctd\u003e1:6\u003c\/td\u003e\n\u003ctd\u003e1:8\u003c\/td\u003e\n\u003ctd\u003e1:12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003eΩ\u003c\/td\u003e\n\u003ctd\u003eΩ\u003c\/td\u003e\n\u003ctd\u003eΩ\u003c\/td\u003e\n\u003ctd\u003eΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e175\u003c\/td\u003e\n\u003ctd\u003e77\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e115\u003c\/td\u003e\n\u003ctd\u003e65\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e360\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e90\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e500\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e130\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e670\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e175\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e870\u003c\/td\u003e\n\u003ctd\u003e390\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e1100\u003c\/td\u003e\n\u003ctd\u003e490\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e130\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e1485\u003c\/td\u003e\n\u003ctd\u003e660\u003c\/td\u003e\n\u003ctd\u003e400\u003c\/td\u003e\n\u003ctd\u003e180\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e1900\u003c\/td\u003e\n\u003ctd\u003e840\u003c\/td\u003e\n\u003ctd\u003e530\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e2375\u003c\/td\u003e\n\u003ctd\u003e1055\u003c\/td\u003e\n\u003ctd\u003e690\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":43231148112,"sku":"ZA ANDROS ALLASSO","price":4500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/products\/Allassob-wfront2.jpg?v=1741632211"},{"product_id":"zesto-audio-bia-120-stereo-poweramp","title":"Zesto Audio Bia 120 Stereo Poweramp","description":"\u003ch1\u003eZesto Audio Bia 120 Stereo Power Amplifier\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003eZesto's Bia 60Wpc, Class A, all-tube power amplifier, with styling to match the company's Leto linestage and Andros phonostage, brings the designers the trifecta. As with the preamps, Bia's personality consists in a completely seductive musicality free from all the usual sorts of electronic colorations and artefacts, for a presentation that never, ever sounds electro-mechanical instead always wholly natural. Broadly neutral but not completely accurate, the sound here is more beautiful than real---luscious, velvety, silken, gorgeous.\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— THE ABSOLUTE SOUND\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/download_56269d02-590a-40f4-a30e-6a3c810b2413_compact.png?v=1550689084\" style=\"margin-right: 4px; float: none;\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDesign Philosophy\u003c\/h3\u003e\n\u003cp\u003eWith my pro audio background in the recording studio and live concert mixing,\u003cbr\u003eI wanted to build an amp that allowed me to hear music the way I know it should sound.\u003c\/p\u003e\n\u003cp\u003eI wanted it to be easy to use, reliable and with plenty of power to drive the speakers. In short, I wanted power without compromising the music.\u003c\/p\u003e\n\u003ch3\u003eClass A Design\u003c\/h3\u003e\n\u003cp\u003eThe tubes are always on, so you have power when you need it. Class A is fast and responsive. There is no lag, providing your music more punch, transient response, better dynamic range and transparency.\u003c\/p\u003e\n\u003ch3\u003eCircuit Topology\u003c\/h3\u003e\n\u003cp\u003eI choose a Class A Ultra-linear, Push-Pull circuit design to deliver the most precise, enjoyable and faithful reproduction possible.\u003c\/p\u003e\n\u003ch3\u003eUnsung Hero\u003c\/h3\u003e\n\u003cp\u003eThe unsung hero of a power amp is its power supply. That’s why my design incorporates a custom Toroid power transformer and a choke-based, dual-mono power supply to deliver all the “slam” you can handle.\u003c\/p\u003e\n\u003ch3\u003eEasy to use\u003c\/h3\u003e\n\u003cp\u003eWith Auto Bias, you need no adjustments. It’s safe, consistent and the settings are always perfect so you can enjoy your music.\u003c\/p\u003e\n\u003ch3\u003eWhat is Bia?\u003c\/h3\u003e\n\u003cp\u003eIn Greek mythology, Bia is the Titan Goddess of force and power.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePlenty of power to drive your speakers\u003c\/li\u003e\n\u003cli\u003ePure Class A power is fast and musical\u003c\/li\u003e\n\u003cli\u003e4, 8 \u0026amp; 16 Ohm taps give you options for your speaker preference\u003c\/li\u003e\n\u003cli\u003eDual Mono gives you less crosstalk and better stereo imaging\u003c\/li\u003e\n\u003cli\u003eNo adjustments with Auto Bias. Its safe, consistent and settings are always perfect\u003c\/li\u003e\n\u003cli\u003eProvides enough gain for most standard preamps and accommodate most speakers\u003c\/li\u003e\n\u003cli\u003eChoice of either Single Ended RCA or Balanced XLR to suit your needs or cable preferences\u003c\/li\u003e\n\u003cli\u003eTransformer balanced XLR input offers true noise rejection and isolation from the preamp\u003c\/li\u003e\n\u003cli\u003eLeft and Right ground switches on the XLR balanced inputs to help eliminate ground hums\u003c\/li\u003e\n\u003cli\u003eNo Negative Feedback provides for virtually no compression to your music\u003c\/li\u003e\n\u003cli\u003eCustom Toroid provides lower noise with plenty of available power\u003c\/li\u003e\n\u003cli\u003eThe global mains power supply can work all over the world\u003c\/li\u003e\n\u003cli\u003eKT120 compatible\u003c\/li\u003e\n\u003cli\u003ePush-Pull circuit design gives you more power\u003c\/li\u003e\n\u003cli\u003eUltra-Linear circuit design provides lower distortion\u003c\/li\u003e\n\u003cli\u003eLow noise levels allow really dark black quiet musical passages\u003c\/li\u003e\n\u003cli\u003eNon-inverting polarity retains the same phase as the input (so your trumpets blow and don’t suck)\u003c\/li\u003e\n\u003cli\u003eGold pin sockets are more reliable because gold doesn't oxidize when it heat cycles\u003c\/li\u003e\n\u003cli\u003eMatched quad output tubes retain the stereo balance\u003c\/li\u003e\n\u003cli\u003eIt’s ready to enjoy with 50 hours of factory burn in on all circuits and vacuum tubes\u003c\/li\u003e\n\u003cli\u003eElegantly designed, heavy duty 14 \u0026amp;16 gauge zinc plated steel enclosure\u003c\/li\u003e\n\u003cli\u003eEach unit is hand built “Made in the USA”\u003c\/li\u003e\n\u003cli\u003eThe wide frequency response allows you to hear the finest passages in your music\u003c\/li\u003e\n\u003cli\u003eHigh-quality gold-plated RCA, XLR connectors and 5-way binding posts\u003c\/li\u003e\n\u003cli\u003eAll fuses are easily accessible\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003c\/h4\u003e\n\u003ch4\u003eOutput\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePure Class A\u003c\/li\u003e\n\u003cli\u003e60 Watts per channel\u003c\/li\u003e\n\u003cli\u003e4, 8 and 16 Ohm output taps\u003c\/li\u003e\n\u003cli\u003e8, 5 and 4 Amp Slow blow fuses for outputs\u003c\/li\u003e\n\u003cli\u003eEight 5 way binding post\u003c\/li\u003e\n\u003cli\u003eNon inverting output polarity\u003c\/li\u003e\n\u003cli\u003ePush-Pull and Ultra-Linear design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInputs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRCA single ended inputs Left and Right with an impedance of 100K Ohms\u003c\/li\u003e\n\u003cli\u003eTransformer floating XLR balanced inputs Left and Right (pin 2 hot)\u003cbr\u003ewith an impedance of 12K Ohms\u003c\/li\u003e\n\u003cli\u003eIndependent ground lift switches on left and right balanced inputs\u003c\/li\u003e\n\u003cli\u003e2 Volts RMS input to reach rated output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDetailed Specs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDual Mono\u003c\/li\u003e\n\u003cli\u003eAuto bias\u003c\/li\u003e\n\u003cli\u003eNo negative feedback\u003c\/li\u003e\n\u003cli\u003eFrequency response 20Hz to 50Khz ~ 2db\u003c\/li\u003e\n\u003cli\u003eTotal Harmonic Distortion ~ 0.22% at 1W output into 8 Ohms\u003c\/li\u003e\n\u003cli\u003eGain of 23dB\u003c\/li\u003e\n\u003cli\u003eNoise level \u0026gt; 0.2 mV RMS into 8 Ohms with input shorted\u003c\/li\u003e\n\u003cli\u003e1% metal film resisters throughout\u003c\/li\u003e\n\u003cli\u003ePolypropylene capacitors throughout the audio path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePower\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCustom Toroidal power transformer with global mains\u003c\/li\u003e\n\u003cli\u003eChoke based power supply design\u003c\/li\u003e\n\u003cli\u003e120 Volts AC mains\u003c\/li\u003e\n\u003cli\u003eOptional factory installed 220V, 230V, 240V 50\/60Hz\u003c\/li\u003e\n\u003cli\u003ePower consumption at rated output 300 Watts\u003c\/li\u003e\n\u003cli\u003eOn\/Off switch conveniently located on front panel\u003c\/li\u003e\n\u003cli\u003e3 pin IEC power connector with fuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eActive Components\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMatched quad set of four (4) KT88’s vacuum tubes\u003c\/li\u003e\n\u003cli\u003eFour (4) Gold pin ECC82s (12AU7) vacuum tubes\u003c\/li\u003e\n\u003cli\u003eHigh quality gold pin ceramic sockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOther Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEach unit is made by hand\u003c\/li\u003e\n\u003cli\u003e50 hour factory burn in on all circuits and vacuum tubes\u003c\/li\u003e\n\u003cli\u003eDimensions 17″ W X 20″ D X 10 ” H\u003c\/li\u003e\n\u003cli\u003eWeight 66 lbs. (30Kg)\u003c\/li\u003e\n\u003cli\u003e16 and 14 gauge Zinc plated steel enclosure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":21340678520892,"sku":"ZA BIA 120","price":7999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/DSC_2433.jpg?v=1741631888"},{"product_id":"zesto-audio-andros-deluxe-ii-phonostage","title":"Zesto Audio Andros Deluxe II Phonostage","description":"\u003ch1\u003eZesto Audio Andros Deluxe II Phonostage\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003eThe Andros Deluxe Vacuum Tube Phono Stage from Zesto Audio is one of five, or maybe six, top phono stages I have ever auditioned. With its ultra-black background, excellent flexibility, and suave presentation, it is exactly the kind of phono stage that floats my boat. I am sure it is one of two or three tube phono stages that clearly compete for gain, definition, quietness, and neutrality, compared to the multi-box solid state beasts roaming the planet right now in the mega-buck price range. George Counnas is as clever as he is a genius. The Andros Deluxe, with its unique tube selection, clearly produces the passion contained in the musical performance itself. The Deluxe belongs at the top of your short shopping list now, and for years to come.\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— BOB LEVI, POSITIVE FEEDBACK, 2018\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Andros Deluxe II comes with Zesto's new ESP power supply which is available as an upgrade for the Andros Deluxe \u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat is the ESP \u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003e(Energy Source Power) Supply?\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eZesto named it the ESP Supply because it anticipates the energy needs of the music. The new ESP Supply unlocks the true potential of the circuit, so it is at ease and doesn’t have to work as hard. It allows more music to flow through with more detail. It also creates a more dynamic presentation, the quiet passages are quieter and louder passages have more punch. The sound quality is an improvement throughout the frequency spectrum, so you have better clarity on the bass, midrange, and highs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHere are the top 8 improvements:\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe transformer changes from an IE to a Toroid design, which generates significantly less noise because it does a better job of concentrating the magnetic field\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe high voltage increases by 17% from 250 V to 300 V which provides more headroom\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDynamic range is increased from 2 dBV to 11 dBV, so the quietest parts are quieter and the louder parts are louder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe ESP Supply is designed with bigger, fewer and heftier parts, which delivers more power with improved reliability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe rugged design of the ESP Supply makes it more resilient to power surges.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBoth the high and low voltage supplies provide more current, so it’s less restrictive to deliver more music\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum output level before clipping is increased up to 3 V RMS, depending on the unit to allow more punch\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIn the Phonostages, the noise level is 5 dBV quieter, which increases the black levels considerably\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Andros Deluxe Phonostage is an exciting blend of Zesto’s award winning Phonostages, taking the very best attributes from both. It’s developed from the same footprint of the Andros 1.2 Phonostage and many of the internal features of the Andros Tèssera Phonostage, yet maintaining its own unique sonic personality.\u003c\/p\u003e\n\u003cp\u003eOne of the unique features is an entirely new output circuit design that is based on the 12DW7 tube to drive the balanced output transformers. The main printed circuit board is dual-mono for better stereo separation. The input circuit incorporates the large,  high-quality built-in MC step-up transformers that are used in the Tèssera. The are designed for better phase linearity. They are also large enough to accommodate all the extra windings and the Mu-metal shielding that reduces noise. This translates to better stereo imaging. The Andros Deluxe II is built with a passion for analog, designed with 100% tube circuitry and no solid state devices anywhere in the signal path.\u003c\/p\u003e\n\u003cp\u003eThe tube complement is a pair of gold-pin, high-gain, low-noise 12AX7’s and a pair of gold-pin, high-current, low-noise 12DW7’s.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHigh-quality built-in MC step-up transformers \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIndependent ground switches affect both the MC-XLR and the MC-RCA inputs and reduce or eliminate hum by breaking ground loops\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBalanced transformers reduce noise by providing a true differential signal and allowing the ground to float, making the noise level very low\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe MM-RCA connectors are always grounded to reduce noise from your cartridge\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe dedicated output transformers are driven by the 12DW7 output tubes providing an accurate balanced signal to your preamp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe output RCA connectors have a floating ground and the XLR are grounded to reduce ground loops\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe tube complement is a pair of gold-pin, high-gain, low-noise 12AX7’s and a pair of gold-pin, high-current, low-noise 12DW7’s\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDual-mono circuit which creates better stereo separation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA low noise level of -80 dBv below maximum output allows the quietest passages to be heard\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTen position MC load 1000, 800, 700, 600, 500, 400, 300, 200, 100, 50 Ohm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEasily adjustable MC “load on the fly” without clicks or pops\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe gain switch applies to both MC and MM inputs, to better match your cartridges\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e100% analog tube circuitry without any solid-state devices in the signal path, because tubes are inherently more musical\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAll the RCA and XLR connectors are gold plated for better conductance and lower corrosion\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eAll switches and knobs are easily accessible, nothing hidden inside to adjust\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEach unit is hand built “Made in the USA”\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e50-hour factory burn-in on all circuits and vacuum tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElegantly designed 16-gauge steel enclosure to help isolate the electronic “chatter” from nearby equipment\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eOutput impedance:\u003c\/strong\u003e 150 Ohm\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eMax output level:\u003c\/strong\u003e +9 V\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eTube complement:\u003c\/strong\u003e 2 x gold pin JJ ECC83S\/12AX7, 2 x JJ ECC832\/12DW7\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eMM impedance:\u003c\/strong\u003e 47 kOhm\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eMM gain (dB):\u003c\/strong\u003e 45, 50\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"content-type\"\u003e \u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eMC impedances (Ohm):\u003c\/strong\u003e 1000, 800, 700, 600, 500, 400, 300, 200, 100, 50\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eMC gain (dB):\u003c\/strong\u003e 63, 68\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eMC capacitance:\u003c\/strong\u003e 220 pf\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eDimensions (WDH):\u003c\/strong\u003e 17\" x 12\" x 5\"\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 21 lb\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2-year limited, 6 months on tubes\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":32474907770940,"sku":"ZA ANDROS DELUXE II","price":8300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/products\/Zesto-043-Edit.jpg?v=1741631272"},{"product_id":"zesto-audio-andros-ii-phonostage","title":"Zesto Audio Andros II Phonostage","description":"\u003ch1\u003eZesto Audio Andros II\u003c\/h1\u003e\n\u003cfigure style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003eZesto Audio's phonostage embodies all the virtues of latter-day tube design with none of the drawbacks. It has solidity, dimensionality, vitality, transparency, excellent transient response, well-defined and extended bass, a superbly rich midrange, and very low noise. A sensibly wide range of loading options is available for MC's, which are stepped up by transformers, which must be in part responsible for the deliciously smooth, unfatiguing highs. An outstanding product.\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— THE ABSOLUTE SOUND\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/download_56269d02-590a-40f4-a30e-6a3c810b2413_compact.png?v=1550689084\" style=\"margin-right: 4px; float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Andros II comes with Zesto's new ESP power supply which is available as an upgrade for the Andros 1.2 \u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003eWhat is the ESP\u003cspan\u003e \u003c\/span\u003e\u003cmeta http-equiv=\"content-type\" content=\"text\/html; charset=utf-8\"\u003e(Energy Source Power) Supply?\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003eZesto named it the ESP Supply because it anticipates the energy needs of the music. The new ESP Supply unlocks the true potential of the circuit, so it is at ease and doesn’t have to work as hard. It allows more music to flow through with more detail. It also creates a more dynamic presentation, the quiet passages are quieter and louder passages have more punch. The sound quality is an improvement throughout the frequency spectrum, so you have better clarity on the bass, midrange, and highs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHere are the top 8 improvements:\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe transformer changes from an IE to a Toroid design, which generates significantly less noise because it does a better job of concentrating the magnetic field\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe high voltage increases by 17% from 250 V to 300 V which provides more headroom\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDynamic range is increased from 2 dBV to 11 dBV, so the quietest parts are quieter and the louder parts are louder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe ESP Supply is designed with bigger, fewer and heftier parts, which delivers more power with improved reliability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe rugged design of the ESP Supply makes it more resilient to power surges.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBoth the high and low voltage supplies provide more current, so it’s less restrictive to deliver more music\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum output level before clipping is increased up to 3 V RMS, depending on the unit to allow more punch\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIn the Phonostages, the noise level is 5 dBV quieter, which increases the black levels considerably\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch4\u003eWhy a Phonostage is So Important\u003c\/h4\u003e\n\u003cp\u003eWhen a vinyl record is made the volume of the bass is reduced and the treble is increased. Otherwise, the bass would cut a groove too big for a stylus to read or for the music to fit the record. The phonostage reverses the process by taking the delicate signal from your cartridge and adjusting it so that the bass and treble are restored to their original volume. This common standard is known as the RIAA curve.\u003c\/p\u003e\n\u003ch4\u003eThe Andros\u003c\/h4\u003e\n\u003cp\u003eInspired by RCA’s vacuum tube circuit designs from the 1930s, the Andros has been engineered to bring you the clarity and depth of the original recording. Your highs will be crisp but not overly emphasized, your midranges clear and present without being shrill and your lows full and firm without being boomy.\u003c\/p\u003e\n\u003ch4\u003eA Startling Difference\u003c\/h4\u003e\n\u003cp\u003eAs we went through testing our panel of audiophiles marveled at hearing subtle nuances, discovering new things in recordings they’d played many, many times. They appreciated its clear stereo image with maximum channel separation and minimal phase distortion.\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe circuit is specifically designed to provide sufficient amplification to match your cartridge with the rest of your system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEach unit is hand built “Made in the USA”\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e50 hour factory burn in on all circuits and vacuum tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA low noise level of -80 dBv below maximum output allows the quietest passages to be heard\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRCA connectors are high quality, Gold plated, recessed with an isolated ground.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIsolated ground RCA connectors plus the ground on\/off switch will allow you to choose the best ground configuration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAll switches and knobs are easily accessible, nothing hidden inside to adjust.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwo position MM switch 47K and 15K Ohm to accommodate more cartridges\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e10 position MC load switch from 20 to 1000 Ohm and more in the sweet spot above 200\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAccommodates both high and low MC output cartridges\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElegantly designed 16-gauge steel enclosure to help isolate the electronic “chatter” from nearby equipment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOn\/Off power switch conveniently mounted on front side panel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEasy-to-read large type on back panel\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOutput impedance:\u003c\/strong\u003e 10 KOhm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMax output level:\u003c\/strong\u003e +8.5 V\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTube complement:\u003c\/strong\u003e 4 x gold pin JJ ECC83S\/12AX7 \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMM input gain:\u003c\/strong\u003e 47 dB\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta http-equiv=\"content-type\" content=\"text\/html; charset=utf-8\"\u003e \u003cstrong\u003eMC input gain:\u003c\/strong\u003e 67 dB\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMC impedances (Ohm):\u003c\/strong\u003e 1000, 800, 600, 500, 400, 300, 200, 100, 50, 20 \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eDimensions (WDH):\u003c\/strong\u003e 17\" x 12\" x 5\"\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 20 lb\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":32474908033084,"sku":"ZA ANDROS II","price":5900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/DSC_2359.jpg?v=1741631271"},{"product_id":"zesto-audio-leto-ultra-ii-preamplifier","title":"Zesto Audio Leto Ultra II Preamplifier","description":"\u003ch1\u003eZesto Audio Leto Ultra II\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\n\u003cblockquote\u003e\n\u003cspan\u003e“\u003c\/span\u003eThe ultimate statement of preamplifier perfection. It is made 100% in America. The all-tube unit is chock full of useful and creative features a dedicated audiophile and music lover will enjoy, styling which would be right at home at MoMa, a flexible remote control without flaws, and Zesto's best overall musical performance to date. Sonically superior to anything solid state I have ever heard, you would have to spend a ton more to equal its high definition and many features in the tube world.\u003cspan\u003e”\u003c\/span\u003e\n\u003c\/blockquote\u003e\n\u003cfigcaption class=\"source\"\u003e— ROBERT H. LEVI, POSITIVE FEEDBACK, FEBRUARY 2020\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Leto Ultra II comes with Zesto's new ESP power supply which is available as an upgrade for all Leto preamps \u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat is the ESP\u003cspan\u003e \u003c\/span\u003e\u003cmeta http-equiv=\"content-type\" content=\"text\/html; charset=utf-8\"\u003e(Energy Source Power) Supply?\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eZesto named it the ESP Supply because it anticipates the energy needs of the music. The new ESP Supply unlocks the true potential of the circuit, so it is at ease and doesn’t have to work as hard. It allows more music to flow through with more detail. It also creates a more dynamic presentation, the quiet passages are quieter and louder passages have more punch. The sound quality is an improvement throughout the frequency spectrum, so you have better clarity on the bass, midrange, and highs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHere are the top 8 improvements:\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe transformer changes from an IE to a Toroid design, which generates significantly less noise because it does a better job of concentrating the magnetic field\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe high voltage increases by 17% from 250 V to 300 V which provides more headroom\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDynamic range is increased from 2 dBV to 11 dBV, so the quietest parts are quieter and the louder parts are louder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe ESP Supply is designed with bigger, fewer and heftier parts, which delivers more power with improved reliability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe rugged design of the ESP Supply makes it more resilient to power surges.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBoth the high and low voltage supplies provide more current, so it’s less restrictive to deliver more music\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum output level before clipping is increased up to 3 V RMS, depending on the unit to allow more punch\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIn the Phonostages, the noise level is 5 dBV quieter, which increases the black levels considerably\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe goal of the Leto Ultra is to deliver the most pristine signal from your audio sources to your power amps, without coloration. It offers lots of inputs and a variety of gain settings, and every adjustment is remote or manually controlled.\u003cbr\u003e\u003cbr\u003eA unique feature of the Leto Ultra is the Presence Control, which was born out of the designer's frustration after finding some of his favorite recordings became unlistenable the more resolved his system became, regardless of the source. This new feature deals with the harmonic balance of the mid and high frequencies. Now you can easily adjust the balance for every song.\u003cbr\u003e\u003cbr\u003eWith the Leto in your system it will allow the sonic detail to come through, so you focus is on the music and the hardware will seem to disappear.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cp\u003e1. New upgraded circuit topology delivers more musical detail with a tighter bass. It has a robust input design to handle higher output sources. Dynamic range is expanded by new circuitry that produces a higher output before distortion. Still features 100% analog tube circuitry throughout the signal path.\u003cbr\u003e\u003cbr\u003e2. New tube configuration with the 12DW7 allows for the smoothest transition from the input section to outputs, providing the cleanest and most musical path for your signal.\u003cbr\u003e\u003cbr\u003e3. Three new gain positions 3 dB, 6 dB, and 9 db make the Leto Ultra one of the most versatile preamps available. It easily accommodates the many volume differences from all your sources such as a high-output DAC, as well as a low-output phono. Your preferred gain settings are saved on each input and can be conveniently adjusted “on the fly” with the Remote or Manual control.\u003cbr\u003e\u003cbr\u003e4. Six new inputs for your many sources include three true dedicated transformer balanced inputs, and three single ended. All are high quality, gold plated connectors for better conductance and less corrosion for the most reliable connection.\u003cbr\u003e\u003cbr\u003e5. Position Presence Control adjusts the harmonic balance in the mid and high frequencies allowing you to dial back what you may consider to be too bright, edgy or aggressive. This is an exceptionally useful tool that addresses the inconsistencies of mastering from any source. It’s easily adjustable “on the fly” with your remote or manually for each piece of music.\u003cbr\u003e\u003cbr\u003e6. New nine-button remote control to conveniently adjust “on the fly” settings including Input, Volume, Presence, Mute, Mono and Gain. In case you misplace your remote, all features can be adjusted manually.\u003cbr\u003e\u003cbr\u003e7. New LED indicators on the front panel clearly display all your adjustments.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo solid-state devices are used for switching the signals, only relays. This reduces noise and provides the most musical detail.\u003c\/li\u003e\n\u003cli\u003eThe wide frequency response allows you to hear the finest passages in your music.\u003c\/li\u003e\n\u003cli\u003eLeft and right ground switches allow you to control the grounding of the outputs.\u003c\/li\u003e\n\u003cli\u003eThe low-impedance output transformers prevent the power amp from affecting the line amp, thus providing the strongest and cleanest signal to your power amplifier.\u003c\/li\u003e\n\u003cli\u003eRecessed RCA and XLR connectors are premium quality, gold plated, with an isolated ground.\u003c\/li\u003e\n\u003cli\u003eAll connectors are durable and will hold up to the typical audiophile who loves to change their configuration.\u003c\/li\u003e\n\u003cli\u003eAutomatically goes to mute when turned on or off, preventing any pops which could damage your speakers or surprise the hell out of you.\u003c\/li\u003e\n\u003cli\u003eThe remote Mono feature helps you to troubleshoot your system, especially phase issues, center balance and sound stage.\u003c\/li\u003e\n\u003cli\u003eEach preamp receives 50 hours of factory burn-in on all circuits and vacuum tubes.\u003c\/li\u003e\n\u003cli\u003eElegantly designed 16-gauge zinc-plated steel enclosure to help isolate the electronic “chatter” from nearby equipment.\u003c\/li\u003e\n\u003cli\u003eOn\/Off power switch conveniently mounted on front side panel.\u003c\/li\u003e\n\u003cli\u003eEach unit is hand-built “Made in the USA”.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"et_pb_column et_pb_column_2_3 et_pb_column_4  et_pb_css_mix_blend_mode_passthrough\"\u003e\n\u003cdiv class=\"et_pb_module et_pb_tabs et_pb_tabs_0 et_slide_transition_to_1 et_slide_transition_to_2\"\u003e\n\u003cdiv class=\"et_pb_all_tabs\"\u003e\n\u003cdiv class=\"et_pb_tab et_pb_tab_2 clearfix et-pb-active-slide\"\u003e\n\u003cdiv class=\"et_pb_tab_content\"\u003e\n\u003ch4\u003eInputs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e6 inputs \u003cspan\u003ewith remote or manual controls\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e3 sets of true transformer balanced inputs (pin 2 hot) with an impedance of 10K Ohm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e3 sets of single-ended inputs with an impedance of 100K Ohm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum input level of 7 V RMS\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOutputs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e4 line outputs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 sets of true transformer balanced outputs (pin 2 hot) with an impedance 150 Ohm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 sets of single-ended outputs with an impedance 150 Ohm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum peak output level of 10 V RMS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 independent ground-lift switches on the left and right outputs\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePresence\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e6 position remote or manual Presence control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePresence  0,-1, -2, -3, -4, -5 (low pass shelf)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e0 = Not engaged\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e-1 = 13 kHz and above\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e-2 = 8 kHz and above\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e-3 = 4 kHz and above\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e-4 = 2 kHz and above\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e-5 = 1 kHz and above\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWhen the unit is turned on, or you switch inputs, the presence control will go to “0”\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePresence control defaults to 0 which disengages from the circuit\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e Gain\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e3 remote controlled gain settings of 9 dB, 6 dB, and 3 dB \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eManual gain switch on rear panel \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGain setting is saved on each input\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDetailed Specifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRemote control Input, Volume, Mute, Mono, Presence and Gain settings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAll adjustments can be operated manually (just in case the remote is misplaced)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response 10 Hz to 40 Khz ~ 2 dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDistortion ~ 0.013% with 1 V RMS input\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSignal to noise ~ 100 dB below operating level\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNon-inverting output polarity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCross talk \u0026gt;90 dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1% metal film resistors throughout\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePolypropylene capacitors throughout the audio path\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePower\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePower consumption 28 W, 0 drain when off\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVoltage 110\/120 V AC 60 Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStandard 3-pin IEC power connector\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eON\/OFF power switch conveniently located on the side panel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwo internal high quality linear regulated power supplies, 250 V and 12 V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVacuum-tube complement:\u003c\/strong\u003e 2 x gold pin JJ ECC82\/12AU7, 2 x gold pin JJ ECC832\/12DW7\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions (WDH):\u003c\/strong\u003e 17” x 12” x 5”\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 28 lb\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"et_pb_column et_pb_column_1_3 et_pb_column_5  et_pb_css_mix_blend_mode_passthrough et-last-child\"\u003e\u003c\/div\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":32474908491836,"sku":"ZA LETO ULTRA II","price":11900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/products\/Leto-Ultra-cropped-1600-x-800-1024x512.jpg?v=1741631269"},{"product_id":"zesto-audio-andros-tessera-reference-phonostage","title":"Zesto Audio Andros Tessera Reference Phonostage","description":"\u003ch1\u003eZesto Audio Andros Tessera Reference Phonostage\u003c\/h1\u003e\n\u003ch3\u003eAll-tube phonostage using 12DW7, 12AX7, and 12AU7 tubes, with an external ESP power supply \u003c\/h3\u003e\n\u003cp\u003eAfter over a year of R\u0026amp;D, Zesto Audio is proud to announce the T-REF as it's fondly known around their shop. The Andros Téssera Reference Phonostage is a complete internal redesign of the original Téssera. An upgrade path for \u003cspan data-mce-fragment=\"1\"\u003eTéssera is available. Contact us for details.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe challenge was to make it better than the Deluxe, and Zesto is so confident it has succeeded that it did not hesitate to use the \"Reference\" label. Says Zesto, \"It’s quieter, it’s more musical and the detail from the groove is astonishing.\"\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe Reference features improved dynamic range and ability, higher power and gain, more finessed adjustable options.\u003c\/p\u003e\n\u003cp\u003eThe T-REF accomodates four tonearms, allowing one MM and one MC per channel. All settings are saved as you switch between channels, and all adjustments have their own external switches or knobs. There are four superior quality MC step-up transformers, and a three-position switch for high-, medium-, and low-gain cartridges. The high-quality output transformers are driven by dedicated 12AU7\/ECC82 output tubes\u003c\/p\u003e\n\u003cp\u003eEvery unit is handbuilt right here in California, and there is a 50-hour burn-in on all circuits and vacuum tubes before final testing. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe T-REF comes with a two-year limited warranty and a six-month warranty on the vacuum tubes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eReference Upgrades\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNew external ESP Supply using three toroids and new circuits\u003c\/li\u003e\n\u003cli\u003eNew tube complement using 12DW7 tubes, as well as, 12AX7 and 12AU7\u003c\/li\u003e\n\u003cli\u003eNew PCB, new circuit design with new optimized components, and new grounding\u003c\/li\u003e\n\u003cli\u003eGain increases up to 7 dB\u003c\/li\u003e\n\u003cli\u003eMore power, going from 52 W to 60 W\u003c\/li\u003e\n\u003cli\u003eHigher voltage, going from 250 V to 300 V\u003c\/li\u003e\n\u003cli\u003eMore efficient standby power that reduces the drain from 7 W to 0.5 W\u003c\/li\u003e\n\u003cli\u003eNoise levels reduced from -90 dB to -95 dB\u003c\/li\u003e\n\u003cli\u003eDynamic range increases from 108 dBV to 116 dBV\u003c\/li\u003e\n\u003cli\u003eMaximum output improved from 8 V RMS to 12 V RMS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMM Specs\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003eImpedance:\u003c\/strong\u003e 47 kOhm or 68 kOhm\u003cbr\u003e\u003cstrong\u003eCapacitance:\u003c\/strong\u003e 220 pf\u003cbr\u003e\u003cstrong\u003eGain (dB):\u003c\/strong\u003e 47, 51, 55\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMC Specs\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003eImpedance Settings (Ohm):\u003c\/strong\u003e 1000, 800, 700, 500, 400, 350, 300, 250, 200, 150, 100, 50\u003cbr\u003e\u003cstrong\u003eGain (dB):\u003c\/strong\u003e\u003cspan\u003e 6\u003c\/span\u003e5, 70, 75\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 600 Ohm\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube Complement:\u003c\/strong\u003e 4 x Gold pin JJ ECC83S\/12AX7, 4 x  JJ ECC832\/12DW7, 2 x Gold pin JJ ECC82\/12AU7\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions (WDH)\u003cbr\u003eMain:\u003c\/strong\u003e 17\" x 15\" x 5.5\"\u003cbr\u003e\u003cstrong\u003ePSU:\u003c\/strong\u003e 17\" x 8\" x 5\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight (Main, PSU):\u003c\/strong\u003e 27 lb, 18 lb\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":40413223977144,"sku":"ZA ANDROS T-REF","price":19900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/products\/T-Reffront.jpg?v=1741630798"},{"product_id":"zesto-audio-andros-spirit-phonostage","title":"Zesto Audio Andros Spirit Phonostage","description":"\u003ch1\u003eZesto Audio Andros Spirit Phonostage\u003c\/h1\u003e\n\u003ch3\u003eA 100% tube phonostage using \u003cspan data-mce-fragment=\"1\"\u003e4 x JJ ECC83S\/12AX7, with ESP power supply, and hand-made in the US.\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003eZesto Audio is proud to be one of the few manufacturers to offer a 100% all-tube analog phonostage at this price point. Zesto has a long history of producing award-winning phonostages since the company launched the original Andros PS1 Phonostage in 2010. George Counnas, founder and chief design engineer of Zesto Audio says, “I designed the Spirit so it would retain only the essential features of its predecessors, while still offering the Zesto Audio signature sound.”\u003c\/p\u003e\n\u003cp\u003eGeorge admits how challenging it is to design a high-quality product that sounds good at a low price point. The new full-size 17″ x 12″ enclosure design represents the new Spirit line of products in development at Zesto Audio. The Spirit is made with 16-gauge steel for better grounding to help isolate the electronic “chatter” from nearby equipment. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe ESP Supply is so named because it anticipates the energy needs of the music. Zesto’s ESP Supply unlocks the true potential of the circuit, so it is at ease and doesn’t have to work as hard. It allows more music to flow through with more detail. It also creates a more dynamic presentation, the quiet passages are quieter, and louder passages have more punch.\u003c\/p\u003e\n\u003cp\u003eThe Andros Spirit uses 100% analog tube circuitry without any solid-state devices in the signal path. It uses a quad of 12AX7, which provides sufficient gain with minimal noise. There is a safety switch to discharge the high voltage before changing tubes.\u003c\/p\u003e\n\u003cp\u003eThe high-quality built-in MC step-up transformers are designed for better phase linearity which translates to better stereo imaging. It offers three of the most popular loading positions, 100, 250, 500, so you can dial in the best match for your cartridge. Users can adjust the MC load on the fly without clicks or pops. All MC loading is on the secondary of the MC step-up transformer. This allows all the delicate signal from the cartridge to pass through to the main circuits for the most musical detail.\u003c\/p\u003e\n\u003cp\u003eTo save money for moving magnet only users, the Andros Spirit is available in an MM-only version that is easily upgradeable to the MM\/MC version. \u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIlluminated tubes for a more sensuous musical experience\u003c\/li\u003e\n\u003cli\u003eEach unit is hand-built in the USA using US and imported parts \u003c\/li\u003e\n\u003cli\u003e50-hour factory burn-in on all circuits and vacuum tubes\u003c\/li\u003e\n\u003cli\u003eDual mono circuit which creates better stereo separation\u003c\/li\u003e\n\u003cli\u003eTwo toroidal transformers: High voltage (300 V),  low voltage (12 V)\u003c\/li\u003e\n\u003cli\u003eRIAA curve is achieved using a passive filter\u003c\/li\u003e\n\u003cli\u003e1% metal film resistors throughout\u003c\/li\u003e\n\u003cli\u003ePolypropylene capacitors throughout the audio path\u003c\/li\u003e\n\u003cli\u003eAll switches and knobs are easily accessible, with nothing hidden inside to adjust\u003c\/li\u003e\n\u003cli\u003e16 gauge zinc plated steel enclosure\u003c\/li\u003e\n\u003cli\u003eTwo-year limited warranty, six months tube warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMM Impedance:\u003c\/strong\u003e 47 kOhms\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMM Capacitance:\u003c\/strong\u003e 200 pf\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMC Impedance:\u003c\/strong\u003e 500, 250, 100 Ohm\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 10K Ohm\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMax. Output Level:\u003c\/strong\u003e +7 V\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube Complement:\u003c\/strong\u003e 4 x JJ ECC83S\/12AX7 \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGain (MM, MC):\u003c\/strong\u003e 44 dB, 64 dB\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSNR (Max. Output):\u003c\/strong\u003e 65 dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRIAA Accuracy:\u003c\/strong\u003e\u003cspan\u003e Within 0.5 dB\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConnections:\u003c\/strong\u003e 1 x stereo RCA input, \u003cspan data-mce-fragment=\"1\"\u003e1 x stereo RCA output \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e 26.5 W\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions (WDH):\u003c\/strong\u003e 17″ W X 12″ D X 3.5″ H\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 14.5 lb.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Zesto Audio","offers":[{"title":"MM Only","offer_id":42883315073208,"sku":"ANDROS-SP MM","price":2997.0,"currency_code":"USD","in_stock":true},{"title":"MM \/ MC","offer_id":42883315105976,"sku":"ANDROS-SP MM\/MC","price":3997.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/Zesto-Spirit-Front-small-cropped-1024x351.jpg?v=1741629954"},{"product_id":"zesto-audio-athena-digital-to-analog-converter","title":"Zesto Audio Athena Digital to Analog Converter","description":"\u003ch1\u003eZesto Audio Athena DAC\u003c\/h1\u003e\n\u003ch3\u003eA tube output DAC with ROHM conversion, native PCM up to 32-bit\/384 kHz, DSD512, seven digital inputs, and balanced transformer outputs\u003c\/h3\u003e\n\u003cp\u003eThe Zesto Audio Athena DAC combines modern digital conversion with Zesto’s tube analog output circuitry. Built around a ROHM DAC chip, Athena is designed to preserve the integrity of the digital signal while adding the dimensionality, texture, and ease that Zesto is known for in its analog components.\u003c\/p\u003e\n\u003ch4\u003eNative Conversion With No Upsampling\u003c\/h4\u003e\n\u003cp\u003eAthena operates bit perfect, with native playback and no upsampling. It supports PCM files up to 32-bit\/384 kHz and DSD up to DSD512, with inputs for USB, optical, coaxial, AES\/EBU, and I2S. The goal is simple: accept the source format as delivered and convert it cleanly, without imposing extra digital processing.\u003c\/p\u003e\n\u003ch4\u003eTube Output Stage\u003c\/h4\u003e\n\u003cp\u003eThe analog stage is a Class A, dual-mono vacuum tube design using two ECC82\/12AU7 tubes and two ECC832\/12DW7 tubes. The 12DW7 tubes handle input duties and drive the output tubes, while the 12AU7 tubes drive true differential balanced output transformers. The circuit uses no negative feedback, and Zesto performs output filtering through the tube output stage rather than adding filters after it.\u003c\/p\u003e\n\u003ch4\u003eNoise Control and Grounding\u003c\/h4\u003e\n\u003cp\u003eAthena uses a proprietary grounding scheme, a 4-layer copper printed circuit board, 12 internal DAC power supply\/regulators, and Zesto’s ESP power supply architecture to reduce digital noise and support the tube output circuits. Independent left and right ground lift switches are provided to help eliminate ground loop hum in real-world systems.\u003c\/p\u003e\n\u003ch4\u003eHandmade in the USA\u003c\/h4\u003e\n\u003cp\u003eEach Athena DAC is handmade in the USA and receives a 50-hour factory burn-in on all circuits and vacuum tubes. The chassis uses a 16-gauge zinc-plated steel enclosure, with gold-plated RCA and XLR output connectors using isolated grounds.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eROHM DAC chip\u003c\/li\u003e\n\u003cli\u003eNative bit-perfect conversion with no upsampling\u003c\/li\u003e\n\u003cli\u003ePCM support up to 32-bit\/384 kHz\u003c\/li\u003e\n\u003cli\u003eDSD support up to DSD512\u003c\/li\u003e\n\u003cli\u003eSeven digital inputs: USB, 2 optical, 2 coaxial, AES\/EBU, and I2S\u003c\/li\u003e\n\u003cli\u003eClass A, dual-mono vacuum tube output stage\u003c\/li\u003e\n\u003cli\u003eBalanced transformer XLR outputs and single-ended RCA outputs\u003c\/li\u003e\n\u003cli\u003eNo negative feedback\u003c\/li\u003e\n\u003cli\u003eIndependent left and right ground lift switches\u003c\/li\u003e\n\u003cli\u003eHandmade in the USA with 50-hour factory burn-in\u003c\/li\u003e\n\u003cli\u003eTwo-year limited warranty, six months on tubes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eInputs:\u003c\/b\u003e USB, 2 x optical (S\/PDIF), 2 x coaxial RCA (S\/PDIF), AES\/EBU, I2S\u003c\/p\u003e\n\u003ch4\u003eOutputs\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eOutput Stage:\u003c\/b\u003e Class A, dual-mono vacuum tube output stage\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBalanced Outputs:\u003c\/b\u003e 1 pair true XLR transformer balanced outputs, pin 2 hot\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSingle-Ended Outputs:\u003c\/b\u003e 1 pair RCA outputs\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Impedance:\u003c\/b\u003e 300 Ω\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMaximum Output Level:\u003c\/b\u003e 3 V RMS\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGround Lift:\u003c\/b\u003e 2 independent ground lift switches for left and right outputs\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Connectors:\u003c\/b\u003e Gold-plated RCA and XLR, recessed with isolated ground\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNegative Feedback:\u003c\/b\u003e None\u003c\/p\u003e\n\u003ch4\u003eDigital Performance\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eDAC Chip:\u003c\/b\u003e ROHM DAC chip\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePCB:\u003c\/b\u003e 4-layer copper printed circuit board\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePCM:\u003c\/b\u003e Up to 32-bit\/384 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDSD:\u003c\/b\u003e DSD64, DSD128, DSD256, DSD512\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eUpsampling:\u003c\/b\u003e None\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Polarity:\u003c\/b\u003e Non-inverting\u003c\/p\u003e\n\u003ch4\u003eVacuum Tubes\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eOutput Tubes:\u003c\/b\u003e 2 gold-pin JJ ECC82\/12AU7\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput\/Driver Tubes:\u003c\/b\u003e 2 gold-pin JJ ECC832\/12DW7\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTube Sockets:\u003c\/b\u003e Gold-pin ceramic sockets\u003c\/p\u003e\n\u003ch4\u003ePower\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003ePower Consumption:\u003c\/b\u003e 30 W, 0 drain when off\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eVoltage:\u003c\/b\u003e 100 V–120 V AC, 60 Hz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOptional Voltage:\u003c\/b\u003e Factory-installed 220 V–240 V AC, 50 Hz\/60 Hz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Connector:\u003c\/b\u003e Standard 3-pin 15 A IEC\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Switch:\u003c\/b\u003e Side-panel on\/off switch\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Supply:\u003c\/b\u003e Internal ESP Supply toroidal transformers, 1 300 V and 1 12 V\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAdditional Power Supply:\u003c\/b\u003e ±15 V switching power supply\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDAC Power Regulation:\u003c\/b\u003e 12 internal DAC power supply\/regulators\u003c\/p\u003e\n\u003ch4\u003eGeneral\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eConstruction:\u003c\/b\u003e 16-gauge zinc-plated steel enclosure\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (WHD):\u003c\/b\u003e 17\" x 5\" x 12\" (431.8 x 127 x 304.8 mm)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 25 lb. (9.3 kg)\u003c\/p\u003e","brand":"Zesto Audio","offers":[{"title":"Default Title","offer_id":53413209768120,"sku":"ATHENA","price":15000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/20250403_105514-2-cropped-1-scaled.jpg?v=1779123475"}],"url":"https:\/\/upscaleaudio.pro\/collections\/zesto-audio.oembed","provider":"Upscale Audio","version":"1.0","type":"link"}