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Audio Research D-90 - Audiogon Discussion Forum
https://forum.audiogon.com/discussions/audio-research-d-90
Audio Research D-90 Hi, I just bought a A.R.D-90 and there is a hum in the right channel.I reversed the inter-connects and still in the right side.I switched the 12ax7's for 12au7's and it got louder.Any ideas or insight?
Audio Research D-90 Stereo Valve Power Amplifier Manual ...
https://www.hifiengine.com/manual_library/audio-research/d-90.shtml
Audio Research D-90. Stereo Valve Power Amplifier (1980-82) add a review. Specifications. B; 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.
Audio Research D-90 | diyAudio
https://www.diyaudio.com/community/threads/audio-research-d-90.96440/
In general, pull the output tubes, the input tubes, and bring the thing up on the variac, around 70-80vac line voltage the fils on the rectifiers will start to conduct - BUT WAIT! - it's a solid state bridge, so just bring up the voltage, and watch to see that all the PS voltages are ok. Including the bias voltage.
Audio Research D90-B | Audiokarma Home Audio Stereo ...
https://audiokarma.org/forums/index.php?threads/audio-research-d90-b.478500/
Audio Research D90-B. Discussion in 'Tube Audio' started by JAN Amps, Nov 1, 2012. JAN Amps Member. Messages: 80. I’m looking for a service manual / schematic for a D90-B and I’m hoping someone out there might be able to lead me in the right direction. I’ve searched the net, and the only ones that I could find were for a D90 which is ...
Arc D90, advice needed | Audiokarma Home Audio Stereo ...
https://audiokarma.org/forums/index.php?threads/arc-d90-advice-needed.63860/
i have my hands on a Audio Research D90 from the mid 80´s, currently out of operation and in the need of new tubes. I have never heard this amp before and hope for a review and advice from you. The guy selling is asking for about 600usd but i do not know if this is a fair deal or not. The amp i need are going to run a pair of Tannoy horns (15 ...
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