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Review: Audio Research Corporation HD 220 Amplifier
https://forum.audiogon.com/discussions/review-audio-research-corporation-hd-220-amplifier
Review: Audio Research Corporation HD 220 Amplifier. My musical tastes include primarily classical, jazz, folk/blues and some exceptional rock. Specific recordings can be discussed via phone @ 610-721-1304. Soundstaging, dynamics, transparency and coherence are paramount, while the correct tonality and warmth are of equal concern.
Audio Research HD-220 Stereo Power Amplifier Manual | HiFi ...
https://www.hifiengine.com/manual_library/audio-research/hd-220.shtml
Power output: 220 watts per channel into 8Ω (stereo) Frequency response: 0.5Hz to 200kHz. Gain: 20.8 dB. Input sensitivity: 4V. Signal to noise ratio: 112dB. Speaker load impedance: 4Ω (minimum) Valve complement: 2 x 6H30, 2 x 6922. Dimensions: 483 x 222 x 495mm. Weight: 26.8kg. Year: 2007. Downloads
Audio Research HD220 hybrid stereo amp. Re-capped and ...
https://www.audiogon.com/listings/lisa8336-audio-research-hd220-hybrid-stereo-amp-re-capped-and-serviced-many-positive-reviews-solid-state
Audio Research HD220 hybrid stereo amp. Re-capped and serviced. Many positive reviews! $9,000 MSRP [Expired] no longer for sale Average Research Pricing The HD220 is the best of both World's if you want a tube-like sound but with the power solid state.
ARCDB
https://www.arcdb.ws/model/HD220
HD220 poster Specifications Power output 220 watts per channel into 8 ohms from 20Hz to 20kHz. 380 watts per channel into 4 ohms. Power bandwidth (-3dB points) 2Hz to 80 kHz Frequency response (-3dB points at 1 watt) 0.5Hz to 200 kHz Input sensitivity 4.0V RMS BAL for rated output. (20.8 dB Bal gain into 8 ohms.) Input impedance
Used Audio Research HD220 Stereo power amplifiers for Sale ...
https://www.hifishark.com/model/audio-research-hd-220
Audio Research HD220 Silver Sound Gallery €10,500,003 Jul 28, 2021. Audio Graffiti. AUDIO RESEARCH > HD 220 Audio Graffiti €4,000 14% Apr 15, 2021.
Audio Research HD 220 | diyAudio
https://www.diyaudio.com/community/threads/audio-research-hd-220.355576/
Audio Research HD 220. Thread starter PBNAUDIO; Start date 2020-06-05 2:36 am; P. PBNAUDIO Member. 2012-02-17 5:04 am. 2020-06-05 2:36 am #1 2020-06-05 2:36 am #1 Freind of mine sent me his HD220 for repair - Blown rectifier was the issue - it had blown the inrush current limiters. Got the Bridge replaced and the amplifier powers up - it ...
audioresearch.com
https://audioresearch.com/wp-content/uploads/2021/08/HD220_Manual.pdf
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