{"product_id":"audio-research-reference-7-linestage-preamplifier","title":"Audio Research Reference 7 Linestage Preamplifier","description":"\u003ch1\u003eAudio Research Reference 7 Line-Stage Preamplifier\u003c\/h1\u003e\n\u003ch3\u003eReference 20-derived architecture, a new multi-metal chassis, and solid-state regulation bring Audio Research’s latest Reference platform to a single-chassis line stage\u003c\/h3\u003e\n\u003cp\u003eThe Reference 7 represents a new generation of Audio Research line-stage preamplifiers. Rather than evolving the previous Reference 6SE, it was developed from the same ground-up platform that produced the flagship Reference 20, bringing key elements of that design into a more compact single-chassis component.\u003c\/p\u003e\n\u003cp\u003eAudio Research positions the Reference 7 directly below the Reference 20 and says its new architecture advances performance beyond the company’s previous flagship preamplifier. Its design centers on mechanical isolation, lower noise, and careful control of resonance, with two 6H30P dual triodes providing the active tube complement.\u003c\/p\u003e\n\u003ch4\u003eReference 20-Derived Mechanical Architecture\u003c\/h4\u003e\n\u003cp\u003eThe Reference 7 shares the fundamental mechanical architecture developed for the Reference 20. Its layered, multi-metal chassis is designed to manage resonance through controlled energy distribution, while suspended, mass-loaded circuit boards further isolate the circuitry from unwanted mechanical energy.\u003c\/p\u003e\n\u003cp\u003eThese measures are intended to protect the integrity of the signal path rather than simply adding mass to the enclosure. The result is a substantially different physical platform from the preceding generation of Audio Research Reference preamplifiers.\u003c\/p\u003e\n\u003ch4\u003eLower-Noise Power Regulation\u003c\/h4\u003e\n\u003cp\u003eAudio Research redesigned the Reference 7 power supply with an emphasis on reducing the noise floor and improving long-term stability. Solid-state regulation replaces the previous approach, combining low-noise operation with increased reliability.\u003c\/p\u003e\n\u003cp\u003eReference-grade output coupling capacitors derived from the Reference 20 are also incorporated into the signal path. Audio Research says the combination of the new mechanical platform, power regulation, and selected components allows the Reference 7 to increase resolution while retaining the texture and musical coherence expected from a Reference-series line stage.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-chassis Reference-series line-stage preamplifier\u003c\/li\u003e\n\u003cli\u003eDerived from the ground-up development platform of the flagship Reference 20\u003c\/li\u003e\n\u003cli\u003eLayered, multi-metal chassis engineered to manage mechanical resonance\u003c\/li\u003e\n\u003cli\u003eSuspended, mass-loaded circuit boards for additional circuit isolation\u003c\/li\u003e\n\u003cli\u003eSolid-state power-supply regulation designed for low noise and long-term stability\u003c\/li\u003e\n\u003cli\u003eReference-grade output coupling capacitors derived from the Reference 20 design\u003c\/li\u003e\n\u003cli\u003eTwo 6H30P dual-triode tubes\u003c\/li\u003e\n\u003cli\u003e12 dB gain from both balanced and single-ended main outputs\u003c\/li\u003e\n\u003cli\u003eBalanced and single-ended connectivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eTube Complement:\u003c\/b\u003e (2) 6H30P dual triodes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFrequency Response (At Rated Output, Balanced, 100 kΩ Load):\u003c\/b\u003e -0.3 dB at 10 Hz, -0.3 dB at 40 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTHD + Noise (2 V RMS Balanced Output, 10 Hz–80 kHz, Unweighted):\u003c\/b\u003e \u0026lt;0.03%\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMain Output Gain:\u003c\/b\u003e 12 dB balanced, 12 dB single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Impedance:\u003c\/b\u003e 25 kΩ balanced, 25 kΩ single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Impedance:\u003c\/b\u003e 600 Ω balanced, 375 Ω single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCrosstalk (1 kHz):\u003c\/b\u003e -76 dB or better\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Requirements (US):\u003c\/b\u003e 100–135 V AC, 60 Hz, 60 W maximum\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eStandby Power Consumption:\u003c\/b\u003e 4.4 W\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (W × H × D):\u003c\/b\u003e 19\" x 7\" x 17.5\" (483 x 178 x 445 mm), including knobs and rear bumpers\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 33 lb. (15 kg)\u003c\/p\u003e\n","brand":"Audio Research","offers":[{"title":"Black","offer_id":53876968980664,"sku":"ARC-REF7-BLK","price":28000.0,"currency_code":"USD","in_stock":true},{"title":"Natural (Silver)","offer_id":53876969013432,"sku":"ARC-REF7-NAT","price":28000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/Ref7-black-front.jpg?v=1786380635","url":"https:\/\/upscaleaudio.pro\/products\/audio-research-reference-7-linestage-preamplifier","provider":"Upscale Audio","version":"1.0","type":"link"}