Kenwood KA 5700 (1977-1979)

Specifications

Feature	Specification
Year of Production	1977-1979
Power Specifications	45W per channel (8Ω, 20Hz-20kHz, 0.08% THD)
Impedance	4-16Ω
Sensitivity	150mV (MM phono), 2.5mV (MC phono)
Key Features	Dual power supply, DC amplifier design, phono equalizer with MC/MM support, loudness control, tape monitor, tone defeat switch, walnut side panels

Historical Significance

The Kenwood KA 5700 was a flagship of the 'Supreme' series, built from 1977 to 1979. Kenwood packed DC amplification and a dual power supply into a single chassis. It was made for buyers who wanted the best Kenwood could build.

Sound Signature

The KA 5700 sounds neutral, transparent and detailed. The DC-coupled circuitry gives taut, controlled bass and crisp transients, and the wide frequency range keeps notes accurate. Coloration is almost none. It gets vinyl close to the sound of the studio floor.

Maintenance and Restoration Tips

After decades of service, these units often need work. Electrolytic capacitors tend to dry out, and replacing them is usually step one. Pots and switches need a thorough cleaning to get rid of crackles. Watch for DC offset drift, which can stress speakers if left alone. Relays occasionally stick, and the front-panel bulbs may need replacing. Most issues are well-documented and can be fixed with common tools.

Collectibility and Market Value

Market Value: $250-$500 depending on condition and cosmetic appearance
Collectibility Rating: 7/10

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