Step into the golden age of Japanese hi-fi with the Luxman SQ-38FD Mark I, a tube integrated amplifier first released in 1974. Known for its warm, musical character and exceptional build quality, the SQ-38FD remains one of Luxman’s most sought-after designs. This unit has been fully restored and is ready to deliver the legendary tube sound that has made it a true classic.
Features & Tube Complement
Year: 1974 (Mark I – first edition of the SQ-38FD)
Design: All-tube integrated amplifier (preamp + power amp in one chassis)
Output Tubes: 50CA10 × 4 (rare Japanese-only beam power tubes, unique to Luxman)
Preamp / Driver Tubes:
12AX7 × 4 (ECC83)
6267 (EF86) × 2 (low-noise pentode for phono/input stages)
6DT8 / 6AQ8 × 2 (driver/phase inverter)
Inputs: Multiple line-level inputs plus a built-in phono stage for vinyl playback
Power Output: Approx. 30 watts per channel (tube-rated)
Controls: Volume, balance, bass, treble, selector switches, and Luxman’s classic panel layout
Construction: Heavy steel chassis, wood cabinet, glowing vintage tubes
Restoration Work
Recapped and serviced to factory specifications for long-term reliability
All tubes tested; weak tubes replaced with strong vintage or new-production where needed
Output stage tuned for stable and reliable operation with 50CA10s
Fully bench-tested for noise, balance, and performance
Why the SQ-38FD Mark I?
One of Luxman’s most iconic tube integrated amplifiers
Uses a rare and complex tube array for exceptional musicality: 50CA10 outputs, plus a mix of 12AX7, 6267, and 6DT8/6AQ8 preamp tubes. The 50CA10 is exceptionally rare, but robust and long-lasting.
Highly regarded for its smooth, dynamic, and detailed tube sound
A rare chance to own a fully restored and functional piece of Japanese audio history
Condition
Cosmetic: Excellent vintage condition, wood case and faceplate very well preserved
Functional: Restored, tested, and ready for daily use
What’s Included
1x Luxman SQ-38FD Mark I Integrated Amplifier (1974)
Full tested tube set:
50CA10 × 4
12AX7 × 4
6267 × 2
6DT8/6AQ8 × 2