{"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","url":"https:\/\/upscaleaudio.pro\/products\/zesto-audio-leto-ultra-ii-preamplifier","provider":"Upscale Audio","version":"1.0","type":"link"}