Audio Research D-52B (circa 1979)
Little is documented about the Audio Research D-52B. A single classified ad is the only period trace of this model found so far. It is a "For Sale" listing in Audio (December 1979, p.127) asking $850, from a seller with a Los Angeles (213) phone number. It ran in the same ad column as a Futerman H3A offered at $500.
The ad doesn't say what the D-52B actually is. There are no specifications, no circuit type, and no mention of whether it is an amplifier, preamplifier, or some other component. The "D" prefix matches Audio Research's amplifier naming of the era, but without documentation that is a guess, not a fact. No owner's manual, service literature, contemporary review, or production information has surfaced.
What is known, in full:
- Model: Audio Research D-52B
- Only documented appearance: classified ad, Audio, December 1979, p.127
- Advertised price (used, as listed): $850
- Specifications, production years, and design: undocumented
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