Revox A-78
Little is documented about the Revox A-78. The period press shows a two-channel integrated amplifier from the early 1970s, built by the same design team that created the celebrated A77 tape recorder. An Audio advertisement (February 1973, p.63) grouped the A78 with the A77 and the A76 tuner as one coordinated family of separates aimed at the serious enthusiast.
The only hard specifications come from Audio (February 1972, p.50). It credited the A78 with 40 watts per channel, 0.1% THD, and 0.3% IM distortion. A HiFI-Stereo buying guide (1974, p.32) still listed it as an integrated amplifier that year.
Beyond those fragments, almost nothing is recorded. No original price, no production years and no service documentation have surfaced.
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