Onkyo A-7070 (circa 1979)
The A-7070 is an Onkyo integrated amplifier from the late 1970s. Today it is known mainly through a single equipment test report in HiFI-Stereo (August 1979, p.1). The report treated it as a 70-watt design and checked the accuracy of its power indicators at 1,000 Hz. The lowest milliwatt-range reading was the one exception. After an hour on test and then five minutes at full output, the top cover was only moderately warm. The rest of the exterior stayed entirely cool. The review also touched on the amplifier's very-low-frequency behavior, in the context of its DC-coupled circuitry.
Onkyo's own advertising that spring, in Audio (May 1979, p.79), promoted its DC-coupled "Super Servo" integrated amplifiers. The ad claimed "three-dimensional imaging" you wouldn't hear from conventional - or even other DC - amplifiers. The A-7070 belongs to that generation. A sibling model, the A-7090, appears in High-Fidelity's 1980 amplifier report at $699.95.
Beyond that, the printed record is thin. No detailed spec sheet, original price, or production years for the A-7070 have surfaced in the sources we've checked. If you own a manual or brochure for this one, the Archive would welcome it.
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