Kenwood KA-9X Integrated Amplifier Top of the line

Kenwood KA-9X Integrated Amplifier

Sigma drive,massive damping factor

Top dog of the line

— Serviced / Partially Recapped
— Boxed
— Made in Japan

That damping factor of 1000 is unusually high — even by modern standards — meaning:
Tight, controlled bass
Excellent grip on difficult speakers
Very low output impedance

Sigma Drive System
Kenwood’s “Sigma Drive” used additional feedback from the speaker terminals to reduce cable losses and distortion. It was their attempt at ultra-accurate reproduction.




Classic early-1980s high-power integrated amplifier from Kenwood’s XL series. A serious piece of vintage hi-fi with excellent build quality and plenty of clean power.

Key Features
120 W per channel into 8 Ω
Stable into 4 Ω loads
Kenwood Sigma Drive speaker feedback system
MM + MC phono stage (moving-coil capable)
Large linear power supply
Fully discrete output stage
Made in Japan

Condition
Fully working
Partially recapped (details available on request)
Controls cleaned — smooth operation

Original box included (rare)
Cosmetically in very good vintage condition with only minor age-related marks. Please see photos.

Sound
Powerful, clean and neutral with excellent bass control. Easily drives demanding speakers.