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HD220 Hybrid Drive Stereo Power Amplifier
https://arcdb.ws/Database/HD220/ARC_HD220_web_flyer.pdf
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. We call it “Hybrid Drive” because that’s how it works. As in the Reference 110, a JFET input (for low noise) feeds a 6922 dual triode
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.
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.
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
Well, I still have my HD220 that I rotate in and out of my stash of amps. And yes the unit has become lean and mean and despite attempts to tube-roll using Amperex pinch waist 6922s and various 6H30s, the lean and mean signature remains. I requested a schematic from Audio Research, but zero response despite emails and phone calls. Absolute ZERO.
High Fidelity: Audio Research HD 220 hybrid amplifier
https://he-japu.blogspot.com/2007/03/audio-research-hd-220-hybrid-amplifier.html
Audio Research HD 220 hybrid amplifier. ARC continues to roll out aggressively new products. The company has so far renewed its entire Reference family (widely lauded by reviewers) and introduced a number of new line stages. In CES 2007 ARC announced a ground-breaking product for them, a hybrid HD220 amplifier. As in the REF110, a JFET input - for low …
Audio Research HD-220 Hybrid Stereo Amp! | Tube | Audiogon
https://www.audiogon.com/listings/audio-research-hd-220-hybrid-stereo-amp
Audio Research HD220 Hybrid Stereo Amp In Classic Silver and black with handles a powerful 220 watts into 8 ohms and 400 ohms into 4 ohms. Comes complete like new in factory box. Current model Serial # 67103910. Looks like new condition rating lower to be conservative.
Hybrids Are Hot | Stereophile.com
https://www.stereophile.com/ces2007/011207hybrid/index.html
Wes Phillips & Jon Iverson | Jan 12, 2007. "Recent advances in solid-state output devices and other components have opened up design possibilities never previously available," Audio Research's Terry Dorn explained. "And thatled to our developing the Hybrid Drive HD220 stereo power amplifier ($8995)." A JFET input feeds a 6922 dual-triode gain stage, which, in …
Audio Research – High-end audio equipment
https://audioresearch.com/
Audio Research has produced some of the finest components for music reproduction; this is especially true with regard to preamplifiers. In 1973, the SP3 was hailed as the best preamplifier available, and this tradition of excellence has continued ever since. The Reference Series from Audio Research was first introduced in 1995 and has been the ...
Audio Nexus: Audio Research preamplifiers amplifiers New ...
https://www.audionexus.com/nl10_audio_research.shtml
Now, two of audio's most prestigious companies are breaking new ground in this area. One of them, Audio Research, has introduced the HD220 tube/solid state power amplifier at $8995, a first for this company. (For a discussion of the other, new hybrid offerings, please see the Conrad Johnson section of this newsletter.) HD stands for Hybrid Drive because that's how this …
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