Kenwood KAF-3010R (circa 2000)
The Kenwood KAF-3010R is an integrated amplifier that appears to date from around 2000, when it carried a Japanese retail price of ¥32,000. Documentation is thin - no production years, no historical narrative, and no owner reviews have survived in the usual places. What the record does show is a well-equipped mid-size amp. Its most interesting feature is a Kenwood technology called TRAIT.
Kenwood's own material, preserved on audio-database.com, describes TRAIT as a world-first integration of temperature detection and compensation circuits into a single chip. The temperature sensing element sits on the same chip as the output transistors, so it detects their temperature almost in real time. That sets up a thermal feedback loop that keeps the transistors operating in an ideal state. It's an unusual engineering claim for a unit in this price class, and it appears to be the KAF-3010R's main talking point. The rest of the design is sensible late-1990s practice. There is a pure signal ground line to keep noise out of the music signal, and a layout arranged along the signal path to minimize trace length. The PCB is softly mounted to resist vibration. A source direct circuit bypasses the tone and balance controls when they're not in use.
Electrically, it's a solid 65W-per-channel design into 8 ohms (85W into 4 ohms, both rated at 40 Hz–20 kHz with 0.06% THD), with 120W per channel into 4 ohms on the EIAJ scale. Distortion is rated at 0.01% at 1 kHz, 40W into 4 ohms. The phono stage handles MM cartridges only, with 2.5 mV sensitivity and a 72 dB signal-to-noise ratio; line inputs are good for 100 dB. There's a loudness control, bass and treble tone controls (±10 dB at 100 Hz and 10 kHz respectively), and a wireless remote is included. It draws 180W, weighs 8.3 kg, and measures 440 × 145 × 400 mm.
The only current market data point is a single Gumtree listing from Anfield, Merseyside, asking £50. It's listed as "1 of 6" items, though no further detail on the others survives. No service manual, spare parts, or common-failure information has been located. If you own a KAF-3010R and can fill in the gaps - production years, the rest of the lineup, how TRAIT holds up in practice - the Archive would welcome the input.
- Integrated amplifier, remote control included
- 65W + 65W (8Ω, 40 Hz–20 kHz, 0.06%); 85W + 85W (4Ω); 120W + 120W (4Ω, EIAJ)
- MM phono input (2.5 mV / 33kΩ); line input (200 mV / 47kΩ)
- TRAIT thermal feedback system — temperature detection and compensation on one chip
- Original price: ¥32,000 (circa 2000)
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