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Audio Research D-90 Vintage Stereo Tube Amplifier - Made ...
https://skyfiaudio.com/products/audio-research-d-90-vintage-stereo-tube-amplifier-made-in-the-usa-80-glorious-watts
D90 Manual - Audio Research
https://audioresearch.com/wp-content/uploads/2021/06/D90_Manual.pdf
audio research high 3900 annapolis lane north / plymouth, minnesota 55447-5447 / phone: 763-577-9700 fax 763-577-0323 d-90 owneris manual schematics
Audio Research D-90 Stereo Valve Power Amplifier Manual ...
https://www.hifiengine.com/manual_library/audio-research/d-90.shtml
Power output: 80 watts per channel into 16Ω (stereo) Frequency response: 25Hz to 20kHz. Total harmonic distortion: 0.5%. Damping factor: 25. Input sensitivity: 1.2V. Signal to noise ratio: 90dB. Dimensions: 490 x 180 x 420mm. Weight: 29kg.
Audio Research D-90 - Audiogon Discussion Forum
https://forum.audiogon.com/discussions/audio-research-d-90
The D-90b Takes 8-5881's,1-6550's,1-12ax7,and 5-6922's The revised D-90 takes 8-5881's or 6l6's,1-6550,4-12ax7's,2-12at7's,2-6fq7's. This is the tube setup mine has. Also the print out i have from the web sight shows pic's of the D-90 and D90b. The D-90b has 8 cans,where the D-90 has 9 can caps.My amp has 9 also.
ARCDB
https://www.arcdb.ws/model/D90
D-90: 90 watts per channel minimum continuous (both channels operating) at 16 ohms from 25 Hz to 20 kHz with less than 1% total harmonic distortion. Typically below .01% at 1 watt. Approximate power available per channel at "clipping" (both CH. OP, 1kHz): 105 watts.
Audio Research D-90 Vintage Tube Amplifier USA Made! 80 ...
https://www.audiogon.com/listings/lis9c52f-audio-research-d-90-vintage-tube-amplifier-usa-made-80-glorious-watts-amplifiers
D-90B: (-3dB points) 12 Hz to 50kHz Frequency response Input sensitivity: 1.2V RMS for rated output (adjustable) Input impedance: 75 kOhms, nominal at maximum gain Output taps: Output regulation: Approximately .8dB, 16 ohm load to open circuit D-90B: Approximately .3dB, 16 ohm load to open circuit Overall negative feedback: 17.5dB / D-90B: 21.5dB
Audio Research D90 - Tube Amplifier - Fully Rebuilt ...
https://www.canuckaudiomart.com/details/649793226-audio-research-d90-tube-amplifier-fully-rebuiltrecapped/
Fully rebuilt/recapped Audio Research D90 - tube amplifier. Power filter caps 8 pcs replaced with nichicon high temp 105C rating as well as all the axial electrolytic caps with Vishay Sprague/Panasonic. Yellow film caps, replaced with Solen Metalized PP caps, Bridge rectifier replaced with the same part but brand new as well as a new 12V regulator.
Audio Research – High-end audio equipment
https://audioresearch.com/
Audio Research continues its dedication to unparalleled musical expression and crafting components of the highest quality and lasting value for its customers. Our long-term dedication to service is peerless in this industry (Audio Research, with few exceptions, can repair anything ever produced during its entire history).
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