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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
Audio Research D-90 Vintage Stereo Tube Amplifier - Made in the USA - 80 Glorious Watts. Warm, musical, and engaging vintage tube amplifier from the …
D90 Manual - Audio Research
https://audioresearch.com/wp-content/uploads/2021/06/D90_Manual.pdf
Your D90 ampl ifier's power cord is equipped with a standard three-prong grounding plug which, if used normally, will ground the chassis to the While this procedure undoubtedly provides the maximum possible power line. in many cases, cause your audio system to have a safety in use it will, residual hum.
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.
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. Year: 1980. Downloads
Audio Research D-90 | Tube | Audiogon
https://www.audiogon.com/listings/lisa6ghc-audio-research-d-90-tube
Audio Research D-90 Tube Amplifier in excellent condition, recently serviced. Amplifier makes faint hum that is normal for this amplifier. It does not pass through as a signal to speakers. Tubes were biased and caps are good, Transformers have been re-covered. Rated and biased as class A amplifier. Tubes will be removed for shipping.
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