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Audio Research D-51 High Definition Audio Amplifier Manual ...
https://www.hifiengine.com/manual_library/audio-research/d-51.shtml
My D-51 was upgraded to the max by factory-authorized Clear Sound's Nick Gowan in Palo Also several years ago. A note added was that Nick …
Audio Research D-51 Tube amp | Via | Reverb
https://reverb.com/item/37020911-audio-research-d-51-tube-amp
Audio Research D-51 power amplifier that plays, performs and sounds good. Had been put away for years by original owner until I acquired. I brought up slowly on variac and performance is good. Could probably stand a service but will play/perform …
Opinion of Audio Research D-51 Tube Amp? - 2-Channel Home ...
https://community.klipsch.com/index.php?/topic/100798-opinion-of-audio-research-d-51-tube-amp/
For example, my old Heathkit- that was pretty tubby. I have always heard good things about Audio Research especially that they tend to still retain good clarity. I have found a D-51 amp online which is from the 70s, however it was serviced by AR 3 years ago. The seller claims some caps where changed, as well as tubes.
Audio Research D-51 | Tube | Audiogon
https://www.audiogon.com/listings/tube-audio-research-d-51-2017-01-04-amplifiers-80526-fort-collins-co
Audio Research D-51 for sale. Selling for a customer. Single owner. New handles on the amp and will include old handles (one old handle has a broken screw stuck in hole). It still sounds good. May need some new tubes. Has been ...
Audio Research D-51 + Dynaudio special 25 (5) - YouTube
https://www.youtube.com/watch?v=l3KmR_wqVhY
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REFERENCE COMPONENTS-VINTAGE AUDIO
http://www.high-endaudio.com/RC-Vintage.html
audio research corp. (ARC) D-51, D-75, D-76, D-79 & D-150- These amplifiers all come from the generation succeeding all of the amps above, but they are now more than 30 years old themselves, so they can finally be considered vintage without compromising the term.
1970's Audio Research Equipment, worth having?
https://forum.audiogon.com/discussions/1970-s-audio-research-equipment-worth-having
The D-79 and D-150 which were originally developed in the 1970's are classic/collectable Audio Research designs and hold up fairly well when compared to later units. I always felt the D-50, D-51 D-75, D-76, D-90, and D-160 had that "soft tube" sound and lack the high definition of the D-70, D-115 and D-250 series.
Audio Research – High-end audio equipment
https://audioresearch.com/
Audio Research continues its dedication to unparalleled musical expression and crafting components of the highest quality and lasting value for its customers. Our long-term dedication to service is peerless in this industry (Audio Research, with few exceptions, can repair anything ever produced during its entire history).
Audio Research Dual 150 power amplifier | Stereophile.com
https://www.stereophile.com/content/audio-research-dual-150-power-amplifier
This question was raised at Audio Research when we compared the D-150 prototype to the D-76A. We felt that while the D-150 was superior to the D-76A, most audio perfectionists would still view the D-76A as the more sensible choice. One important feature on the D-150 is the front panel meter and bias adjustments. With these controls, the D-150's ...
Audio Research Manuals | HiFi Engine
https://www.hifiengine.com/manual_library/audio-research.shtml
Audio Research. Founded in 1970, Minnesota company Audio Research produce a range of high-end audio products and have had particular success with its highly reviewed class A vacuum tube and valve hybrid amplifiers. Current models include the Reference series which retain the trademark casework and rack mount handles.
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