ARC SP6A (production years unknown)
Surviving information on the ARC SP6A is thin. No factory specifications, design literature, or production dates have surfaced in the archive so far. What the record shows is a trail of classified ads in Audio magazine from 1979 to 1981, including an August 1981 ad asking $695 (Audio, August 1981, p.73). Those ads confirm the SP6A, an Audio Research model, was on the used market alongside other ARC gear such as the SP3A1, D76A, D52B, and D-110. They also give a rough idea of asking prices (Audio, November 1979, p.138).
- Nov 1979 — $1,000 (Audio, November 1979, p.138)
- Jul/Aug 1980 — $750 (Audio, July 1980, p.81; August 1980, p.76)
- Oct 1980 — $850 (Audio, October 1980, p.144)
- Aug 1981 — $695 (Audio, August 1981, p.73)
These are asking prices in private classifieds, not confirmed sales, and they are the most specific record of the SP6A the Archive has. If you own one, or have its manual or a period catalog page, the Archive would be glad to fill in the rest.
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