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Audio Research HD220 Hybrid stereo power amplifier
https://www.hifisound.co.uk/amplifier-zone-c59/home-cinema-amplifiers-c71/power-amplifiers-c97/hd220-hybrid-stereo-power-amplifier-p1169#:~:text=Audio%20Research%20HD220%20Hybrid%20stereo%20power%20amplifier%20,150k%20ohms%20SE%20%2014%20more%20rows%20
Audio Research HD-220 Hybrid Fet Amplifier HD220
https://amlifiprea.com/hd-220
Review (mpn: HD-220 for sale) HD-220 AUDIO RESEARCH HD220 Hybrid Tube Fet Amplifier. This is an exceptional amplifier and blends the perfect balance of tube voltage gain stage with solid state current output. Driver tubes are Electra harmonics. I was using this to drive a pair of bl studio monitors and it always has ample power.
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
The HD220 is the best of both World's if you want a tube-like sound but with the power solid state. Being a hybrid design, it uses two 6922 and two 6H30 tubes in the input stage with a solid state output stage that produces 220W in 8 ohm and 380W in 4 ohm.
ARCDB
https://www.arcdb.ws/model/HD220
Recent advances in solid-state output devices and other components have opened up design possibilities as never before, allowing Audio Research engineers to combine the strengths of two different technologies in a completely new power amplifier: the new Hybrid Drive HD220 stereo power amplifier.
Owner’sManual - Audio Research
https://audioresearch.com/wp-content/uploads/2021/06/HD220_Manual.pdf
HD220 for On/Off control of the amplifier, or the 12V start-up trigger for remote installations. The AC power source for the HD220 amplifier should be capable of supplying 10 amperes for 100 or 120 volt units, or 5 amperes for 220 or 240 volt units. For …
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. Category: Amplifiers. 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.
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