Altec A-340A (c. 1955)
Nearly everything known about the A-340A comes from Altec's own 1955 advertising. No independent test report or technical literature has surfaced in the archive. The ads consistently show a power amplifier, introduced alongside the A-440A preamplifier and billed as Altec's latest development in home high fidelity.
The one concrete spec in the period pages is Altec's own claim of 35 watts at 0.5% distortion, printed in High Fidelity (September 1955, p.54). The A-340A was also part of a matched line of 27 Altec home units, each styled to coordinate with the rest. Complete Altec home music systems in that line ranged from $324 to $1,180 (High Fidelity, December 1955, p.117).
Beyond that, the record is thin. Frequency response, impedance, dimensions and weight are not documented in the material the archive has, and no period publication appears to have bench-tested the A-340A on its own. If you have a manual, a spec sheet, or a surviving example, the archive would like to hear from you.
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