Dynaco A-50
An 8-ohm load so well behaved that amplifiers run easy, and a walnut cabinet that cost less than the competition's vinyl wrap.
Overview
At $179.95, the Dynaco A-50 sat at the top of a speaker line that had already upended what budget-minded audiophiles thought was possible. Dynaco's own advertising called it the "first family of loudspeakers," and the A-50 was the patriarch - a full-range system in oiled walnut that looked like it belonged in a living room, not a dorm. High-Fidelity (May 1971, p.41) measured one of the smoothest impedance curves yet recorded. It averaged the rated 8 ohms across the audio band and never dipped below 7.2 ohms. That means the A-50 presents a nearly resistive load. It asks for current with the predictability of a space heater, not the moody demands of a reactive loudspeaker. Amplifiers run cooler, distortion stays lower, and owners who paired the A-50 with modest receivers got results that shouldn't have been possible at the price.
The cabinet measures 28 by 21½ by 10 inches. That is large for a bookshelf but compact for what it delivers. HiFI-Stereo (May 1971, p.38) documented its tone-burst performance at 80, 1,400, and 7,000 Hz, noting a smooth overall frequency response across the critical midrange where most music lives. That smoothness was the hallmark of the A-series. These speakers didn't call attention to themselves and didn't hype one octave at the expense of another.
Dynaco priced the A-50 at $179.95 in 1971, though later advertisements from 1972 sometimes listed it at $175.95, suggesting a modest price adjustment or regional variation. Either way, it anchored a line that included the A-10 at $99.95 per pair, the A-25 at $79.95, and the A-35 at $119.95. The A-50 was the one you graduated to - the speaker you bought after you'd built your Dynaco amplifier kit and realized the weakest link in your system was the pair of hand-me-down boxes in the corner.
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