ARC D-100A
Almost nothing is documented about the ARC D-100A. The only known period reference is in the classified section of Audio (June 1981, p.87). A D-100A was offered there for $625, described as mint with original carton and manual.
Beyond that single listing, no specifications, design details, production years, or original price have been located. No service manual, promotional material, or further period mentions have surfaced. The record is a classified line and little else.
Known facts:
- Listed for sale at $625 in June 1981 (mint, with carton and manual)
- Appears alongside other ARC (Audio Research) models in period classifieds
- No technical specifications of any kind have been found
- No design or circuit information survives
- No production years or original retail price are known
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