{"product_id":"audio-research-reference-80s-stereo-power-amplifier","title":"Audio Research Reference 80S Stereo Power Amplifier","description":"\u003cp\u003eThe Reference 80S stereo amplifier delivers Audio Research’s signature vacuum-tube performance in a more accessible design. Using two KT150 tubes per channel in a fully balanced differential circuit it provides rich harmonics, deep bass, dynamic contrast and low distortion against a quiet background. Features include proprietary auto-bias, switchable Triode\/Pentode modes, balanced and single-ended inputs, tube monitoring and extensive connectivity options. Built with a four-layer circuit board and hand-assembled in Minnesota, the 80S combines advanced engineering, elegant styling and user-friendly operation to elevate the performance of high-end loudspeakers with immersive, lifelike musical reproduction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Output:\u003c\/strong\u003e 70 watts continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 140 watts, below 0.04% at 1 watt. (Note that actual power output is dependent upon both line voltage and “condition” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not critical)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Bandwidth:\u003c\/strong\u003e (-3dB Points) 7Hz to 68kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e (-3dB points at 1 watt) 0.7Hz to 94kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Sensitivity:\u003c\/strong\u003e 1.4V RMS Balanced for rated output. (25.5 dB gain into 8 ohms). RMS SE for rated output. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 300k ohms Balanced; 75k ohms Single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Polarity:\u003c\/strong\u003e Non-inverting. Balanced input pin 2+ (IEC-268)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Taps:\u003c\/strong\u003e 4, 8, 16 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Regulation:\u003c\/strong\u003e Approximately 1.0dB 16 Ohm Load to Open Circuit (Damping factor approximately 8)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOverall Negative Feedback: \u003c\/strong\u003e15dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSlew Rate:\u003c\/strong\u003e 10 volts\/microsecond\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRise Time:\u003c\/strong\u003e 4.0 microseconds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e 105-130VAC 60Hz (210-250VAC 50Hz) 420 watts at rated output, 280 watts in Triode mode, 221 watts at “idle”, 3.6 watts off Units for Japan: 100VAC 50\/60Hz \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTubes Required: \u003c\/strong\u003e2 matched pair KT150 (Power output V1-V4); 2 6H30 (Gain stage V5, V6)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e 18.5” (47 cm) chassis; 19.0” (48.26 cm) faceplate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e 10.5” (26 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDepth:\u003c\/strong\u003e 18.5” (47 cm) \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWith handles \u0026amp; connectors:\u003c\/strong\u003e 21” (53.3 cm) \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight: \u003c\/strong\u003e 62 lbs. (28.2 kg) Net; 73 lbs. (32.7 kg) Shipping\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Silver","offer_id":51597162119456,"sku":null,"price":18500.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":51597162152224,"sku":null,"price":18500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/3728\/1568\/files\/editARReference80Ssilverfront.jpg?v=1778357005","url":"https:\/\/salon1audio.com\/products\/audio-research-reference-80s-stereo-power-amplifier","provider":"Salon 1 Audio","version":"1.0","type":"link"}