Kenwood - KA-3750 Solid state integrated amplifier

This very neat and certainly well-functioning Kenwood KA-3750 is a classic stereo integrated amplifier (solid-state) that Kenwood released in the 1970s as part of their Trio/Kenwood audio line. This amplifier is designed to deliver a compact yet high-quality hi-fi sound in a relatively small enclosure. It offers sufficient power for small to medium listening rooms and has a warm, natural sound that is typical of hi-fi equipment from that era.

This beautiful vintage device features analog controls for volume, balance, and tone control, as well as multiple inputs including a phono input for turntable use — ideal for vinyl enthusiasts. The KA-3750 was built with traditional components and has since become popular among vintage audio enthusiasts because of its rugged construction and classic sound.

Main Specifications

Feature Value
Type: Stereo integrated amplifier
Power: 20 W per channel (at 8 Ω)
Frequency range 20 Hz – 20 kHz
Total Harmonic Distortion (THD) 0.08 %
Damping factor 30
Input sensitivity 2.5 mV (MM phono), 150 mV (line)
Signal-to-noise ratio 72 dB (MM), 100 dB (line)
Line output level 140 mV
Speaker impedance 4 Ω – 16 Ω
Dimensions (W×H×D) 380 × 140 × 291 mm
Weight ± 5.7 kg

Functionality & Use
• Analog controls: classic knobs for volume, balance and tone.
• Multiple inputs: including a phono input for turntables, plus line-level inputs for other sources.
• Portable vintage hi-fi: a suitable choice for audio enthusiasts who love retro sound and systems with separate components.

Note:

Some online sources cite divergent specifications (such as 42 W per channel), but the most reliable technical data from service manuals and hi‑fi specifications lists 20 W per channel as the nominal output power.