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Audio Research – High-end audio equipment

    https://audioresearch.com/
    Experience Audio Research – experience High Definition®. Power Amplifiers. At the heart of our Power Amplifiers is decades of proven Audio Research vacuum tube technology, a legacy unrivaled by any other manufacturer of tube electronics. Developed through hundreds of hours of critical listening, the carefully selected components comprising ...

Audio Research HD-220 Hybrid Fet Amplifier

    https://amlifiprea.com/hd-220
    audio research hd-220 Is Similar To: 07204026 Audio Research Acoustic Preamplifier With Mm Phono (40.9% similar) Hum noise, magnetic phono input, less than 1uv equivalent input noise with 1 kohms riaa weighted. High level inputs, essentially overload proofmagnetic phono input, 150mvrms 1khz magnetic input to main output 60 dbharmonic …

audioresearch.com

    https://audioresearch.com/wp-content/uploads/2021/08/HD220_Manual.pdf
    audioresearch.com

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 ...

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 for sale. 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 ...

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 ...

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