Audio Research SP-6C
Little is documented about the Audio Research SP-6C. A classified advertisement in Audio (January 1983, p.87) placed by Sound World, Ltd. in Virginia Beach offered the SP-6C-1 at $1,350 with full factory warranty, priced above the SP-8 ($975) and SP-7 ($750) in the same listing. Beyond that entry, the record is nearly empty: no production years, no factory literature, and no period review with full specifications have surfaced.
The only other trace is a current eBay listing that calls the SP-6C a stereo tube preamplifier and asks $1,500. That word "tube" is about all the page has for circuit information. If you own an SP-6C or have documentation - a manual, a brochure, a review - the Archive would welcome a correction.
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