Fisher 300 (circa 1964–1965)

Surviving information on the Fisher 300 is thin, and it comes entirely from period advertising. The ads attached to this model in the Archive's holdings consistently name it as the Fisher TX-300 — a solid-state stereo control-amplifier. Whether TX-300 was simply the fuller name of the Fisher 300 or a closely related sibling is not established anywhere in the surviving record.

Fisher's advertising in HiFI-Stereo (October 1964, p.65) touted a total IHF music power output of 100 watts from a single chassis, built around what it called a low-heat Fisher transistor-amplifier design. The same campaign, repeated in Audio (August 1965, p.9), stressed the absence of output transformers and claimed this removed the bass and transient-response limitations ordinarily imposed by transformer characteristics. The ad copy gave the TX-300 as 15⅛ × 4³⁄₁₆ × 11⅞ inches, 24 pounds, priced at $329.50 with a $24.95 optional cabinet.

That is the extent of the record. No service manual, no independent bench test, no production-run details, and no sales history have surfaced. What the ads do tell us is that Fisher had a 300-series solid-state control-amplifier on the market by late 1964, and that the company was pushing its low-heat, transformer-free transistor design hard.