Kenwood KA-3004 (1973)
The Kenwood KA-3004 is a solid-state integrated amplifier from 1973, sold under the Trio name in its home market of Japan. It's a compact piece of early-70s engineering. Rated output is 14 watts per channel into 8Ω, a figure one seller called "very conservative." Frequency response runs from 20Hz to 50kHz, and total harmonic distortion is 0.5%. It measures 435mm wide, 153mm high, and 300mm deep, and weighs 8.5kg, which says something about the transformer and build inside.
Not much documentation survives. One seller described a "nice aluminium faceplate and knobs," and a Belgian listing called it "rarely offered and is an absolute must." A Dutch listing from May 2025 asked €275 for one, and a Russian ad listed one at 18,000 ₽. The one recurring cosmetic issue is missing black caps on some of the toggle switches. Replacement switch tips are still available as spare parts.
The record is thin on deeper details: no original price, no phono stage specifications, no damping factor or S/N ratio. It was made in Japan, and it was a stereo pre-main amplifier in the classic sense, with preamp and power amp on one chassis. Service manuals and schematics still circulate among collectors. One seller noted it was in "original very good working condition with 2 phono input," which hints at the input complement.
Known specs, such as they are:
- Solid-state integrated amplifier (pre-main), made in Japan, 1973
- Power output: 14 W/ch into 8Ω (described as conservative)
- Frequency response: 20Hz–50kHz
- THD: 0.5%
- Dimensions: 435 × 153 × 300 mm (W×H×D); 8.5 kg
- Known cosmetic issue: missing caps on some toggle switches
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