Kenwood KA-7100D (1977–1978)

The Kenwood KA-7100D is a DC stereo integrated amplifier built in Japan around 1977-78. Overseas it was sold as the Trio KA-7100D, and it is essentially the same amplifier as the Kenwood KA-7100. It survives in the collector market more than in the period record. Listings and forum posts mention it, but original reviews and detailed specifications are scarce.

What is documented comes mostly from marketplace listings and owner activity. The amp is rated at 60 watts per channel and weighs a substantial 11.5 kg. It was configured for 100-volt power, which fits a Japanese domestic unit. A YouTube video walks through the DC offset, bias current and center voltage adjustment procedures for the KA-7100D, so someone in the service community is keeping these running. A "full restoration" video with review and tips also exists.

Owners who have posted about it tend to be positive. One Russian listing claims the unit is in good condition, fully functional, and "sounds great," and a seller in Uzbekistan says it's in good condition and sounds good. On Audio Asylum, a 2003 thread shows a user asking about its performance and sound quality, though no substantive answer is recorded there. A 2002 thread shows another user asking how much output power it produces. Documentation was apparently hard to come by even then.

Asking prices vary widely: roughly CA$400 on one Canadian listing, 25,000 rubles on a Russian classifieds site, and 16,400 rubles on another marketplace. Some units are described as "fully restored," others as "working and serviced" or "tested with 30-day guarantee." One seller notes the amp comes with two original brochures. Service documentation exists. Schematic diagrams for the KA-7100 and KA-8006 circulate in manual collections.

Missing from the record: frequency response figures, THD and signal-to-noise specs, dimensions, the original launch price, and any input/output details beyond the "DC amplifier" designation. If you own one and have the manual, the Archive would welcome the missing numbers.

Known specs: