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Audio Research Sp-6a-Should it be modified?
https://forum.audiogon.com/discussions/audio-research-sp-6a-should-it-be-modified
I got my first ARC pre-amp in 1989- an SP-6b. A buddy of mine who was experienced and competent with modifying ARC gear did a nice upgrade for me. He replaced the film capacitors with WonderCaps, changed the resistors to metal film, new trim pots on the tube voltage bias circuits, Litz wiring throughout and gold RCA jacks.
Audio Research SP-6A | Pre-Amplifiers | Audiogon
https://www.audiogon.com/listings/lis9j24a-audio-research-sp-6a-pre-amplifiers
Audio Research SP-6A [Expired] no longer for sale Average Research Pricing For sale is vintage Audio Research SP-6 tube preamplifier. I had a few of those preamps over the years and this is the best of them.
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 preamp had an above average power supply with 11 large twist-lok can capacitors.
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 that are wonderfully accurate on voices and most instruments. They are available on the used market at very affordable (by 2020 standards) of about $700. Beats anything else close to that price. Comments
ARCDB
https://arcdb.ws/SP6/SP6.html
SP-6A: 500 ohms main output, 1000 ohm tape output. Recommended minimum load for maximum audio quality 50K ohms and 500pF maxumum capacitance. SP-6B: Less than 500 ohms main output, 1000 ohms tape output.
Audio Research – High-end audio equipment
https://audioresearch.com/
Preamplifiers. 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 ...
Stereo Preamp | Vintage Tube Preamps | Phono Preamplifier
https://www.soundsclassic.com/preamps.html
Beautiful Late 70's Audio Research SP-6A Tube Phono Preamp w/ Gold RCA Inputs Phono/Outputs Main. Tube Compliment: (4) Telefunken 12AX7 in …
AUDIO RESEARCH SP6a
https://www.audioantiquary.com/en-us/audio-research-sp6a/
AUDIO RESEARCH SP6a ... SP4 and SP5, the American manufacturer decided to go back to its origins by producing what is the first entirely tube preamplifier of the new course of the historic brand. The device follows the new and much more refined aesthetic canons inaugurated by the two previous models, refined and "professional" livery that will ...
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.
Audio Research SP-6B All Tube Preamp with Phono Stage ...
https://skyfiaudio.com/products/audio-research-sp-6b-all-tube-preamp-with-phono-stage-in-box
Audio Research SP-6B All Tube Preamp with Phono Stage - With Original Box. $0. Fully tested and performing wonderfully, all analogue unit, with manual and BRAND NEW NOS GE American made tubes. These matched tubes are a rare find and are included in the preamp. I just removed them from the box, tested and installed in the preamp, and it's ...
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