Kenwood MODEL 600 (1977-1979)

Specifications

Feature	Specification
Year of Production	1977-1979
Power Specifications	120W per channel (8Ω), 150W per channel (4Ω), stereo
Impedance	4-16Ω
Sensitivity	1.5V for full output
Key Features	Dual mono construction, DC amplifier design, toroidal power transformer, direct-coupled circuitry, dual power meters, massive heat sinks, independent left/right power supplies

Historical Significance

The Kenwood MODEL 600 is the flagship of Kenwood's Supreme Series. It arrived in 1977, built during the golden era of Japanese high fidelity. It combined high power with tight precision, and it set a benchmark for what a high-end receiver could be. It has a dual mono layout and an oversized toroidal transformer. It was built to command speakers, not just drive them.

Sound Signature

The MODEL 600 sounds transparent and uncolored. Bass is deep, tight, and controlled. Highs carry plenty of detail without turning harsh. Dynamics are explosive, handling the softest whisper and the loudest crescendo with equal authority. Distortion is virtually nonexistent, even at full volume, which made this amp a favorite among purists who want accuracy over embellishment.

Maintenance and Restoration Tips

After decades of service, these amps need careful attention. Electrolytic capacitors are often dried out, especially the massive filter caps, so a full recap is usually the first step. The dual power meters rely on tiny bulbs that burn out over time, and they are tricky to replace. Potentiometers benefit from cleaning to cure channel imbalance or scratchiness. Thermal paste on the output transistors degrades, which risks overheating. The protection relays can stick or fail, cutting output. A well-serviced MODEL 600 will perform as it did in 1978, only safer.

Collectibility and Market Value

Market Value: $800-$1,500 depending on condition and cosmetic appearance
Collectibility Rating: 8/10

Market Value

┌──────────────────────────────────────────────────────────────────────────┐
│ KENWOOD MODEL 600                                               Aug 2026 │
├──────────────────────────────────────────────────────────────────────────┤
│ High      $406                                    Latest            $406 │
│ Median    $93                                     Trend             ▲ Up │
│ Low       $21                                     Volume           ~8/mo │
├──────────────────────────────────────────────────────────────────────────┤
│   $500 ┤                                                                 │
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│   $286 ┤              .        .                                         │
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│         2026-02                      2026-05                      2026-07│
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