{"title":"Audio Research","description":"\u003cp\u003eBill Johnson founded Audio Research in Minnesota in 1970 with one goal, which the company still states plainly: to advance the state of the art in music reproduction. He was working with vacuum tubes at the moment the industry had decided they were finished. More than fifty years later, the argument looks settled in his favor.\u003c\/p\u003e\n\u003cp\u003eJohnson's standard is worth quoting, because it explains the products better than any description of them: \"If it measures badly it isn't going to sound good. But the simple fact that it measures well doesn't assure it will sound good.\" That belief is built into the company. Every new product and every serviced piece is listened to by one person, Warren Gehl, who has held the role of Chief Sonic Evaluator for thirty years, before it is allowed to ship.\u003c\/p\u003e\n\u003cp\u003eThe current range runs from the \u003ca href=\"\/products\/audio-research-reference-330m-monoblock-power-amplifier\"\u003eReference 330M\u003c\/a\u003e — the finest amplifier the company has built — through the Reference and LS preamplifiers, the \u003ca href=\"\/products\/audio-research-d-80-stereo-power-amplifier\"\u003eD-80\u003c\/a\u003e and the Reference power amplifiers, to the I\/55 and I\/70 integrated amplifiers and the Reference Phono stages. Tubes remain the heart of it, with auto-bias, tube monitoring, and hour metering to take the maintenance anxiety out of owning them, and the trademark GhostMeter showing the tubes at work behind the face. A solid-state line now runs alongside, in the S-100 and S-200 amplifiers.\u003c\/p\u003e\n\u003cp\u003eEverything is built by hand in the Minnesota facility, and every design comes from Audio Research engineers rather than outside contractors. The company also stocks parts to repair and restore most of what it has made across its history — which is the sort of commitment that changes what a purchase means.\u003c\/p\u003e\n\u003cp\u003eTube amplification asks for the right loudspeaker — hear Audio Research with \u003ca href=\"\/collections\/sonus-faber\"\u003eSonus faber\u003c\/a\u003e or the high-sensitivity horns from \u003ca href=\"\/collections\/o-audio\"\u003eØ Audio\u003c\/a\u003e, and \u003ca href=\"\/pages\/contact\"\u003earrange a listening session\u003c\/a\u003e around the record you know best.\u003c\/p\u003e","products":[{"product_id":"audio-research-reference-20-line-stage-preamplifier","title":"Audio Research Reference 20 Line-Stage Preamplifier","description":"\u003cp\u003eThe Reference 20 is Audio Research's flagship line-stage preamplifier, a complete rethinking of the category developed without constraint in pursuit of absolute sonic transparency. The traditional stamped chassis is replaced with a multi-metal, layered construction that disperses resonant energy, and critical circuits are mounted on custom suspended, mass-loaded boards that isolate the signal path from mechanical influence. A comprehensively redesigned power supply with advanced regulation and next-generation film capacitors lowers noise on the regulated rails by an order of magnitude, and the single-chassis REF20 surpasses its two-chassis predecessor in every respect.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eChassis\u003c\/th\u003e\n\u003ctd\u003eMulti-metal, layered construction for resonance control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eCircuit boards\u003c\/th\u003e\n\u003ctd\u003eCustom suspended, mass-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eConfiguration\u003c\/th\u003e\n\u003ctd\u003eSingle-chassis line-stage preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eMade in\u003c\/th\u003e\n\u003ctd\u003eMinnesota, USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower supply\u003c\/th\u003e\n\u003ctd\u003eAdvanced regulation with next-generation film capacitors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417942921409,"sku":null,"price":48000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Ref20-top-side2.jpg?v=1785024449"},{"product_id":"audio-research-reference-7-line-stage-preamplifier","title":"Audio Research Reference 7 Line-Stage Preamplifier","description":"\u003cp\u003eThe Reference 7 brings the full measure of Audio Research's latest development work to a broader expression of the reference preamplifier. Rather than adapting an existing design, it is derived directly from the ground-up platform that produced the Reference 20, carrying forward the same multi-metal layered chassis and custom suspended, mass-loaded circuit boards. Its power supply transitions to solid-state regulation for exceptionally low noise, while reference-grade output coupling capacitors derived from the flagship preserve signal purity throughout.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eChassis\u003c\/th\u003e\n\u003ctd\u003eMulti-metal, layered construction shared with the Reference 20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eCircuit boards\u003c\/th\u003e\n\u003ctd\u003eCustom suspended, mass-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eConfiguration\u003c\/th\u003e\n\u003ctd\u003eSingle-chassis line-stage preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFinishes\u003c\/th\u003e\n\u003ctd\u003eSilver, black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput coupling capacitors\u003c\/th\u003e\n\u003ctd\u003eReference-grade, derived from the flagship design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower supply regulation\u003c\/th\u003e\n\u003ctd\u003eSolid-state, low noise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417942954177,"sku":null,"price":28000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/ref7-2_d4896ff9-9f45-4079-abdf-213cb5e2e623.jpg?v=1785024450"},{"product_id":"audio-research-ls28se-line-stage-preamplifier","title":"Audio Research LS28SE Line-Stage Preamplifier","description":"\u003cp\u003eThe LS28SE draws on Audio Research's experience creating the Reference 160-series power amplifiers, with numerous costly component upgrades that elevate clarity, resolution, transient snap and sense of space. Four 6H30P dual-triode tubes form the line stage, and connectivity is generous, with four balanced and four single-ended inputs plus two sets of both balanced and single-ended outputs. Input naming, tube-hour metering, auto shutdown and home-theater passthrough are all directed through the menu, with phase invert and mono as standard functions.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 6.5 in H x 13.7 in D, 16 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDynamic range\u003c\/th\u003e\n\u003ctd\u003e122dB (AES17)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e0.4Hz to 200kHz (+0\/-3dB, balanced, at rated output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eGain\u003c\/th\u003e\n\u003ctd\u003e18.5dB balanced, 12.5dB single-ended (main output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003e8 total - 4 balanced XLR, 4 single-ended RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eFour 6H30P dual triodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eVolume control\u003c\/th\u003e\n\u003ctd\u003e103-step rotary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417942986945,"sku":null,"price":12000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/LS28SE-6_79ef6f95-09a2-493a-8cd2-60f28199236f.jpg?v=1785024451"},{"product_id":"audio-research-ls-2-preamplifier","title":"Audio Research LS-2 Preamplifier","description":"\u003cp\u003eInspired by the original LS2 line stage of 1992, the modern LS-2 is a pure tube, zero-feedback, pure Class-A design with two 6H30 dual-triode tubes at its heart and no solid-state devices in the signal path. A single gain stage with constant-current cathode bias and a cathode follower delivers the harmonic richness and dimensionality of dual-triode vacuum tubes. An all-new touch-screen display provides input naming, intensity and color adjustment, and user-installable DAC and MM\/MC phono cards are optional.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 7 in H x 17.5 in D, 33 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eFull touch-screen with input labeling and color options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e10Hz to 40kHz (-0.3dB at rated output, balanced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eGain\u003c\/th\u003e\n\u003ctd\u003e12dB balanced and single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eBalanced XLR and RCA; optional user-installable DAC and MM\/MC phono cards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTopology\u003c\/th\u003e\n\u003ctd\u003ePure Class A, zero feedback, single gain stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eTwo 6H30 dual triodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOptions \u0026amp; Upgrades\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eDAC card\u003cbr\u003e\u003csmall\u003eUser-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eMM\/MC phono card\u003cbr\u003e\u003csmall\u003eUser-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eBoth DAC and phono cards, factory preinstalled\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003csmall\u003ePrices shown are for the base configuration. Ask us about options and factory upgrades when you visit.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943019713,"sku":null,"price":8450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/LS-2-middle-page.jpg?v=1785024452"},{"product_id":"audio-research-ls-3-preamplifier","title":"Audio Research LS-3 Preamplifier","description":"\u003cp\u003eThe LS-3 is a solid-state preamplifier from Audio Research's dedicated solid-state engineering team, externally identical to the LS-2 yet built on a fully balanced differential JFET input stage, a bipolar-transistor voltage amplifier and Class-A output stages. The signal path is fully dual-mono, with separate power transformers per channel, a zero-gain cascaded voltage reference and linear power supplies for low noise and outstanding dynamics. The all-aluminum chassis is shared with the LS-2, and a touch-screen display carries the font of the Reference GhostMeters for a cohesive look.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eArchitecture\u003c\/th\u003e\n\u003ctd\u003eDual mono with separate power transformers per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 7 in H x 17.5 in D, 33 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e10Hz to 40kHz (+\/-0dB at rated output, balanced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eGain\u003c\/th\u003e\n\u003ctd\u003e20dB balanced and single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eBalanced XLR and RCA; optional user-installable DAC and MM\/MC phono cards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTHD+Noise\u003c\/th\u003e\n\u003ctd\u003eLess than 0.007% at 2V RMS balanced output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTopology\u003c\/th\u003e\n\u003ctd\u003eSolid-state, differential JFET input, Class-A output stages\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOptions \u0026amp; Upgrades\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eDAC card\u003cbr\u003e\u003csmall\u003eUser-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eMM\/MC phono card\u003cbr\u003e\u003csmall\u003eUser-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eBoth DAC and phono cards, factory preinstalled\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003csmall\u003ePrices shown are for the base configuration. Ask us about options and factory upgrades when you visit.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943052481,"sku":null,"price":7450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Product-grid-LS-3.jpg?v=1785024454"},{"product_id":"audio-research-reference-330m-monoblock-power-amplifier","title":"Audio Research Reference 330M Monoblock Power Amplifier","description":"\u003cp\u003eThe Reference 330M is the finest amplifier Audio Research has created, the culmination of more than fifty years of vacuum-tube design. Its all-tube signal path runs from an ECC83 input through six KT170 output tubes, with tube regulation in the power supply, delivering 330 watts with the delicacy usually associated with low-power amplifiers. Auto-bias holds the output stage in constant calibration, output tube life is rated at 3,000 hours, and the fully balanced design also accepts single-ended sources.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eControl\u003c\/th\u003e\n\u003ctd\u003e12V triggers, RS-232 remote control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eBalanced XLR and single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e4 and 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e330 watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube biasing\u003c\/th\u003e\n\u003ctd\u003eAuto-bias\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eSix KT170 output; one ECC83 and one 6H30 input; one 6550 and one 6H30 power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e101 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943118017,"sku":null,"price":45000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/330M-gallery8.jpg?v=1785024455"},{"product_id":"audio-research-reference-750sel-monoblock-power-amplifier","title":"Audio Research Reference 750SEL Monoblock Power Amplifier","description":"\u003cp\u003eThe Reference 750SEL continues the pursuit begun by the Reference 600: a full-scale vacuum-tube amplifier with enough power to drive any loudspeaker. Sixteen KT150 power tubes per channel deliver 750 watts continuous into loads of 4 to 16 ohms through a massive custom-built power and output transformer, with approximately 1300 joules of power supply energy storage in reserve. It is built for the largest listening rooms and the largest loudspeaker designs.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e1Hz to 200kHz (-3dB at 1 watt)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInput impedance\u003c\/th\u003e\n\u003ctd\u003e200K ohms balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e4, 8 and 16 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e750 watts per channel continuous, 20Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower supply energy storage\u003c\/th\u003e\n\u003ctd\u003eApproximately 1300 joules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eEight matched pairs KT150 output; KT150 driver pair; 6550WE and 6H30 regulation; 6H30 follower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e170 lbs net per monoblock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943150785,"sku":null,"price":42500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/REF750-1_b87939a8-e28f-415f-9e3d-cc401e6014be.jpg?v=1785024456"},{"product_id":"audio-research-reference-160m-mkii-monoblock-power-amplifier","title":"Audio Research Reference 160M MkII Monoblock Power Amplifier","description":"\u003cp\u003eThe Reference 160M MkII is a central pillar of the Reference amplifier range, with a refined audio topology that places fewer, better components in the signal path on a four-layer circuit board. Four KT150 output tubes and four 6H30 drivers deliver 140 watts, with switchable Ultralinear or Triode operation and a proprietary auto-bias circuit that continuously adjusts for tube wear and also accepts 6550, KT88 and KT120 tubes. The trademark GhostMeter serves as a window onto the output tubes while incorporating a power output meter with adjustable brightness.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFinishes\u003c\/th\u003e\n\u003ctd\u003eNatural silver, black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e0.5Hz to 110kHz (-3dB at 1 watt)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOperating modes\u003c\/th\u003e\n\u003ctd\u003eSwitchable Ultralinear \/ Triode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e4, 8 and 16 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e140 watts continuous, 20Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube biasing\u003c\/th\u003e\n\u003ctd\u003eProprietary auto-bias, compatible with KT150, KT120, KT88 and 6550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eTwo matched pairs KT150 output, four 6H30 gain stage (per monoblock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943183553,"sku":null,"price":22500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Ref160M-3.jpg?v=1785024458"},{"product_id":"audio-research-reference-160s-stereo-power-amplifier","title":"Audio Research Reference 160S Stereo Power Amplifier","description":"\u003cp\u003eThe Reference 160S distills the resolution, dynamic impact and finesse of the multiple-award-winning REF160M monoblock into a single stereo chassis. Dual GhostMeters float in front of eight KT150 output tubes, and the amplifier carries over the 160M's proprietary auto-bias circuit, switchable Triode or Ultralinear operation, balanced and single-ended inputs, and output tube monitoring. A four-layer circuit board allows music to emerge from a jet-black background.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e0.5Hz to 110kHz (-3dB at 1 watt)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOperating modes\u003c\/th\u003e\n\u003ctd\u003eSwitchable Ultralinear \/ Triode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e4, 8 and 16 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e140 watts per channel continuous, 20Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube biasing\u003c\/th\u003e\n\u003ctd\u003eProprietary auto-bias\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eFour matched pairs KT150 output, four 6H30 gain stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e100 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943216321,"sku":null,"price":28000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Ref160S-midpage_572e1235-4084-462d-8a46-0d67293cf1d7.jpg?v=1785024459"},{"product_id":"audio-research-reference-80s-stereo-power-amplifier","title":"Audio Research Reference 80S Stereo Power Amplifier","description":"\u003cp\u003eThe Reference 80S packs Reference-level tube amplification into the most accessible entry in the range, with two KT150 output tubes per channel delivering 70 watts. Like every Reference amplifier before it, the 80S is a fully balanced differential design built on a four-layer circuit board with a separate ground plane. Switchable Triode or Pentode operation, a proprietary auto-bias circuit that compensates for tube age and line voltage, XLR and single-ended inputs, and 4-8-16 ohm taps make it a tube amplifier that never requires fiddling. It is built by hand in Audio Research's Maple Grove, Minnesota facility.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eBalanced XLR and single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOperating modes\u003c\/th\u003e\n\u003ctd\u003eSwitchable Pentode \/ Triode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e4, 8 and 16 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e70 watts per channel continuous, 20Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube biasing\u003c\/th\u003e\n\u003ctd\u003eProprietary auto-bias with line-voltage compensation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eTwo matched pairs KT150 output, two 6H30 gain stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e62 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943249089,"sku":null,"price":23000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Ref80s-6.jpg?v=1785024460"},{"product_id":"audio-research-d-80-stereo-power-amplifier","title":"Audio Research D-80 Stereo Power Amplifier","description":"\u003cp\u003eThe D-80 revives the prefix worn by the legendary Audio Research amplifiers that established the high-performance amplifier market. Its foundation is taken directly from the Reference 80S: a pair of KT150 output tubes per channel in a fully balanced differential signal path, operating in full pentode mode. Auto-bias adjusts the output tubes continuously in real time for line voltage and tube age, and the amplifier offers balanced XLR inputs with 4, 8 and 16 ohm taps. Every unit is built in Minnesota, tested twice and individually auditioned in the company's reference system.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eBalanced XLR only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e4, 8 and 16 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e80 watts per channel continuous, 20Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTopology\u003c\/th\u003e\n\u003ctd\u003eFully balanced differential, full pentode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube biasing\u003c\/th\u003e\n\u003ctd\u003eContinuous real-time auto-bias\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eTwo matched pairs KT150 output, two 6H30 gain stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e62 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943281857,"sku":null,"price":12950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/D-80-midpage.jpg?v=1785024461"},{"product_id":"audio-research-s-200-stereo-power-amplifier","title":"Audio Research S-200 Stereo Power Amplifier","description":"\u003cp\u003eThe S-200 is a 200-watt-per-channel stereo amplifier from Audio Research's solid-state engineering team, a pure Class A\/B design on a truly dual-mono platform with dual toroidal transformers feeding fully balanced circuits. Bipolar transistors were chosen over MOSFETs for their purity, transparency and dynamics. The machined aluminum chassis, available in black or silver anodized finishes, carries custom machined heat sinks and power output meters styled after the Reference amplifiers, rendered on a solid black background.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDamping factor\u003c\/th\u003e\n\u003ctd\u003e300 from 20Hz to 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 7 in H x 17.5 in D, 41 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e20Hz to 20kHz (+\/-0.1dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInput impedance\u003c\/th\u003e\n\u003ctd\u003e100K ohms balanced or single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e200 watts per channel into 8 ohms, 400 watts into 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTHD\u003c\/th\u003e\n\u003ctd\u003eLess than 0.1% from 0.25W to rated output into 8 ohms at 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTopology\u003c\/th\u003e\n\u003ctd\u003ePure Class A\/B, dual mono, fully balanced, bipolar output devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943314625,"sku":null,"price":12950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Product-grid-S-200_a4393b60-fa72-4545-beee-88f9b965edab.jpg?v=1785024462"},{"product_id":"audio-research-s-100-stereo-power-amplifier","title":"Audio Research S-100 Stereo Power Amplifier","description":"\u003cp\u003eThe S-100 answers founder Bill Johnson's demand that solid-state designs never fail to engage the listener. Like the S-200, it is a pure Class A\/B design on a dual-mono platform, conservatively rated at 100 watts per channel and doubling into 4 ohms via dual toroidal transformers and a fully balanced stereo circuit, with bipolar transistors chosen over MOSFETs. The machined aluminum chassis in black or silver anodized finish features custom machined heat sinks with no visible fasteners from the front or top, and every unit is produced in the Minnesota facility alongside the Reference tube amplifiers.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 7 in H x 17.5 in D, 41 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e20Hz to 20kHz (+\/-0.1dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eGain\u003c\/th\u003e\n\u003ctd\u003e26dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInput impedance\u003c\/th\u003e\n\u003ctd\u003e100K ohms balanced or single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e100 watts per channel into 8 ohms, 200 watts into 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTHD\u003c\/th\u003e\n\u003ctd\u003eLess than 0.1% from 0.25W to rated output into 8 ohms at 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTopology\u003c\/th\u003e\n\u003ctd\u003ePure Class A\/B, dual mono, fully balanced, bipolar output devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943380161,"sku":null,"price":9450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Product-grid-S-100_361daa93-35fd-472d-a33e-2b19bc3184f8.jpg?v=1785024463"},{"product_id":"audio-research-i70-integrated-amplifier","title":"Audio Research I\/70 Integrated Amplifier","description":"\u003cp\u003eThe I\/70 combines Audio Research separates in a single compact package, its visual design taking cues directly from the Reference 330M. The same output transformer used in the famed Reference 75 amplifier is paired with four KT120 output tubes to produce 70 watts per channel, governed by auto-bias, with independent tube preamplifier and tube amplifier sections and a 75-step volume control. The headphone output is driven by the KT120 output tubes themselves, and optional user-installable cards add an AKM Velvet Sound DAC with USB, optical, coax and Bluetooth, or MM\/MC phono with adjustable MC loading from 50 to 1k ohms.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e16.5 in W x 8.25 in H x 13.5 in D, 55 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFinishes\u003c\/th\u003e\n\u003ctd\u003eNatural silver, black anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003e4 balanced, 4 single-ended; optional DAC and MM\/MC phono cards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e8 and 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e70 watts per channel continuous, 20Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube biasing\u003c\/th\u003e\n\u003ctd\u003eAuto-bias\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eTwo matched pairs KT120 output, three 6922 (one input, two driver)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOptions \u0026amp; Upgrades\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eDAC card\u003cbr\u003e\u003csmall\u003eAKM Velvet Sound DAC with USB, optical, coax and Bluetooth; user-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eMM\/MC phono card\u003cbr\u003e\u003csmall\u003eUser-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eBoth DAC and phono cards, factory preinstalled\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003csmall\u003ePrices shown are for the base configuration. Ask us about options and factory upgrades when you visit.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943445697,"sku":null,"price":9950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/1-70-6-1500px.jpg?v=1785024465"},{"product_id":"audio-research-i55-integrated-amplifier","title":"Audio Research I\/55 Integrated Amplifier","description":"\u003cp\u003eThe I\/55 imports the functionality of the I\/70 into a chassis that maintains the look and power output of the I\/50 it succeeds. Its all-tube amplification circuit uses two matched pairs of 6550 power tubes fed by 6922 input tubes to deliver 50 watts per channel, now with auto-bias to keep the output tubes in their optimal range for life. Two LexieTubes display input selection and volume, an active preamplifier section feeds stereo preamp outputs, the headphone output is driven by the 6550 output tubes, and optional cards add an AKM Velvet Sound DAC or MM\/MC phono stage.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e16.5 in W x 7.25 in H x 13.5 in D, 40 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eTwo LexieTubes for input and volume\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003e4 balanced, 4 single-ended; optional DAC and MM\/MC phono cards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eOutput taps\u003c\/th\u003e\n\u003ctd\u003e8 and 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003ePower output\u003c\/th\u003e\n\u003ctd\u003e50 watts per channel continuous, 20Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube biasing\u003c\/th\u003e\n\u003ctd\u003eAuto-bias\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eTwo matched pairs 6550WE output, three 6922 (one input, two driver)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOptions \u0026amp; Upgrades\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eDAC card\u003cbr\u003e\u003csmall\u003eAKM Velvet Sound DAC; user-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eMM\/MC phono card\u003cbr\u003e\u003csmall\u003eUser-installable\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eBoth DAC and phono cards, factory preinstalled\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003csmall\u003ePrices shown are for the base configuration. Ask us about options and factory upgrades when you visit.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943478465,"sku":null,"price":6950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Product-grid-I-55_905b1a8c-8eb7-4ed8-b7ac-f5eaf8b3816e.jpg?v=1785024466"},{"product_id":"audio-research-reference-phono-10-phono-stage","title":"Audio Research Reference Phono 10 Phono Stage","description":"\u003cp\u003eThe Reference Phono 10 is Audio Research's ultimate phono stage, a true dual-mono design across separate amplification and power supply chassis, with independent signal paths, separate high- and low-voltage transformers per channel, and twenty stages of electronic regulation including separate vacuum-tube regulation for each channel. The fully discrete, pure Class-A, zero-feedback audio circuit uses eight 6H30 tubes, with high-gain, extremely low-noise FETs in place of a step-up transformer. Two independently configurable inputs offer switchable gain, seven loading options and selectable RIAA, Columbia and Decca equalization, all accessible by remote control.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eConfiguration\u003c\/th\u003e\n\u003ctd\u003eTwo-chassis, true dual mono\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eEqualization\u003c\/th\u003e\n\u003ctd\u003eSelectable RIAA, Columbia, Decca\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003eWithin 0.2dB of RIAA, 10Hz to 60kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eGain\u003c\/th\u003e\n\u003ctd\u003eSelectable 51dB (low) or 74dB (high) balanced at 1kHz, MC and MM compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eLoading\u003c\/th\u003e\n\u003ctd\u003eSelectable 1000, 500, 200, 100, 50 ohms and Custom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTopology\u003c\/th\u003e\n\u003ctd\u003eFully balanced, pure Class A, zero feedback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eEight 6H30P dual triodes, plus two each 6550C and 6H30P in power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOptions \u0026amp; Upgrades\u003c\/h3\u003e\u003ctable\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em;font-weight:400\"\u003eDiscrete mono input\u003cbr\u003e\u003csmall\u003eDedicated mono input option, Reference Phono 10 only\u003c\/small\u003e\n\u003c\/th\u003e\n\u003ctd style=\"white-space:nowrap\"\u003e+$1,500\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\u003cp\u003e\u003csmall\u003ePrices shown are for the base configuration. Ask us about options and factory upgrades when you visit.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943511233,"sku":null,"price":42000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/ref10-phono-rack2.jpg?v=1785024467"},{"product_id":"audio-research-reference-phono-3se-phono-stage","title":"Audio Research Reference Phono 3SE Phono Stage","description":"\u003cp\u003eThe Reference Phono 3SE represents a new performance benchmark in a single-chassis phono stage, carrying the ultra-high-quality parts upgrades introduced with the Reference 6SE line stage. The vacuum-tube audio stage uses six 6H30 tubes, three per channel, with a 6H30 and a 6550 providing partial tube regulation in the power supply. Two inputs with independent settings accommodate two turntables or tonearms, with selectable gain, loading and RIAA, Columbia or Decca equalization, a vacuum fluorescent display, tube-hour meter, and both balanced and single-ended outputs.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 7.8 in H x 16.5 in D, 36.5 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eEqualization\u003c\/th\u003e\n\u003ctd\u003eSelectable RIAA, Columbia, Decca\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003eWithin 0.2dB of RIAA, 10Hz to 60kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eGain\u003c\/th\u003e\n\u003ctd\u003eSelectable 51dB (low) or 73dB (high) balanced at 1kHz, MC and MM compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eTwo, independently configurable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eLoading\u003c\/th\u003e\n\u003ctd\u003eSelectable 1000, 500, 200, 100, 50 ohms and Custom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eSix 6H30P dual triodes, plus one each 6550WE and 6H30P in power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943544001,"sku":null,"price":22500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/Ref3-phono-3-1.jpg?v=1785024468"},{"product_id":"audio-research-ph9-phono-stage","title":"Audio Research PH9 Phono Stage","description":"\u003cp\u003eThe PH9 is Audio Research's classic all-tube phono stage, providing class-leading phono preamplification for the majority of cartridge and turntable combinations. A trio of 6H30 vacuum tubes forms the core of a simple, clear signal path with 58dB of gain. Five impedance settings allow cartridge loading to be changed on the fly from the included metal remote, and cartridge impedance, tube hours and auto shutdown are managed through the menu system.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 6.5 in H x 13.7 in D, 15.4 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003eWithin 0.2dB of RIAA, 5Hz to 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eGain\u003c\/th\u003e\n\u003ctd\u003e58dB at 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eLoading\u003c\/th\u003e\n\u003ctd\u003eSelectable 47k, 1000, 500, 200, 100 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eRemote\u003c\/th\u003e\n\u003ctd\u003eIncluded metal remote with on-the-fly loading control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eThree 6H30P dual triodes, plus one each 6550WE and 6H30P in power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943576769,"sku":null,"price":12000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/PH9-Phono-HD-Mobile2_f1712601-62a3-4d37-a9ca-d3fcfbaeb8da.jpg?v=1785024470"},{"product_id":"audio-research-dac9-tube-dac","title":"Audio Research DAC9 Tube DAC","description":"\u003cp\u003eThe DAC9 combines a vacuum-tube analog section with the latest digital design, decoding DSD music files and PCM files up to 384kHz through two separate data paths that ensure proper integer decoding. Quad D-A converters run dual stereo DACs in mono per channel to increase dynamic range and lower the noise floor, with selectable digital filters and native-rate upsampling on all inputs. The balanced, Class-A, zero-feedback analog section uses a pair of 6H30 dual-triode tubes with no capacitive coupling, fed by an asynchronous USB input and four galvanically isolated SPDIF inputs.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eAnalog stage\u003c\/th\u003e\n\u003ctd\u003eBalanced, Class A, zero feedback, no capacitive coupling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDAC architecture\u003c\/th\u003e\n\u003ctd\u003eQuad D-A converters, dual stereo DACs per channel in mono\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e19 in W x 7 in H x 15.5 in D, 32 lbs net\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eAsynchronous USB 2.0HS (44.1kHz to 384kHz PCM, DSD, 2xDSD); RCA, BNC, XLR to 192kHz; Toslink to 96kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eSignal-to-noise ratio\u003c\/th\u003e\n\u003ctd\u003eGreater than 114dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eTube complement\u003c\/th\u003e\n\u003ctd\u003eTwo 6H30 dual triodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding-right:1.5em\"\u003eUpsampling\u003c\/th\u003e\n\u003ctd\u003eAll inputs upsample to 384kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCall or visit the showroom about availability.\u003c\/strong\u003e Contact our team for pricing, a demonstration, or system design — \u003ca href=\"\/pages\/contact\"\u003eget in touch\u003c\/a\u003e.\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":50417943609537,"sku":null,"price":12000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/8340\/9857\/files\/DAC9-HD-MObile.jpg?v=1785024471"}],"url":"https:\/\/soundsanctuaryaustin.com\/collections\/audio-research.oembed","provider":"Sound Sanctuary Austin","version":"1.0","type":"link"}