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Audio Research SP6 Tube Preamp - Kevin O
http://kevin.kevino.org/tubes/sp6.shtml
Modified Audio Research SP6 Tube Preamp. In July, 2002 I picked up a 1978 Audio Research SP6 preamp. Here is a photo from the original Ebay ad where I found and bid on it. The unit was in very good condition but badly in need of repair. This …
Audio Research SP-6 High Definition Stereo Preamplifier ...
https://www.hifiengine.com/manual_library/audio-research/sp-6.shtml
These (the 6 and 8 series preamps) put Audio Research into a ton of audiophile homes. These are somewhat overly warm but detailed preamplifiers …
Review: Audio Research SP-6b Tube preamp
https://forum.audiogon.com/discussions/review-audio-research-sp-6b-tube-preamp
The SP-6B in its day was an excellent preamp, however it has been eclipsed by more recent designs. The noise floor is excessive, and frequency extremes are attenuated. The midrange is smooth, airy and typical of the better tube units. More recent ARC preamps (i.e. SP-14) are notably superior, for a modest increase in expense.
The Vintage Beat: Audio Research SP-6B, Harmon Kardon ...
https://jeffsplace.positive-feedback.com/the-vintage-beat-audio-research-sp-6b-harmon-kardon-citation-1-and-mcintosh-mx110-preamplifiers/
There's quite a few versions of the the Audio Research SP-6 series of preamplifiers: the SP-6, SP-6A, SP-6B, SP-6C, and SP-6E, and it is the Audio Research SP-6B like Ron's that some SP-6 aficionados consider to be the best sounding of the SP-6 series. We have been wondering if an SP-6C type circuit (as in the schematics above) could reach an even …
Audio Research SP-6 Pre-Amp - YouTube
https://www.youtube.com/watch?v=Sa6ueX-xI4Y
Had the 'Audio Research' Pre-Amplifier fixed by Caxton St Audio, Dave did a great job getting it up and running ... very happy. Now for a Power Amp .....
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