Dynaco Stereo 35
Overview
Fifty-nine dollars and ninety-five cents. That was the ask for a Dynakit Stereo 35 in kit form when Dynaco introduced it. The factory-wired version was $79.95, cover included. For that money you got a stereo basic amplifier measuring 13 by 5 by 4 inches. The circuit is spare: each channel uses only three tubes, and the power supply leans on two silicon diodes. High Fidelity (January 1964, p.65) noted the Stereo 35's disarmingly simple circuit design alongside those dimensions and prices in its equipment report.
That last characteristic is what makes the amp usable with low-efficiency speakers: an occasional peak might overload it, but everything except the highest peak of the heaviest passage comes through effortlessly.
Dynaco's own advertising in High Fidelity (September 1964, p.71) billed the related SCA-35 integrated as "the finest low-powered amplifier on the market." The ad claimed it sounded like a big, powerful, expensive amplifier even with low-efficiency speakers, and invited comparison against amplifiers at twice its cost. That's marketing copy, not a verdict. It does show where Dynaco positioned the low-power end of its line, and the Stereo 35 is the basic amplifier at the bottom of that same range. The company's ad copy in the same publication the following year (February 1965, p.107) repeated the claim verbatim, which suggests they believed it.
The Stereo 35 is a low-power amplifier, and no amount of transformer quality changes that. Pair it with efficient speakers and it will do things that embarrass far more powerful designs. Pair it with notoriously hungry speakers and you'll hear the overload. Dynaco's design intent was to handle that overload gracefully, but it is overload nonetheless.
For collectors, the appeal is a genuine Dynaco design and a circuit that does more with three tubes per channel than most people expect. It was never meant to be a high-powered amplifier. It suits someone with efficient speakers and a small room.
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