Luxman A-321

Little is documented about the Luxman A-321 beyond its own manuals. It was a solid-state stereo integrated amplifier, rated at 50 watts per channel into 8 ohms. It shared its service documentation with two siblings, the A-311 and the A-331, so Luxman clearly built these as a small family on a common platform. The owner's manual for the A-321/A-311 and the service manual covering the A-321/A-331 both survive. That makes the technical record better than the historical one: we know how the amp was built and adjusted, but not when it was introduced, what it cost, or how it was received.

The manuals give a reasonably complete spec sheet. Power output is quoted at 50 W per channel into 8 ohms at 0.08% THD across 20 Hz-20 kHz. Line input sensitivity is 150 mV with 35k ohm impedance. The phono input is 2.5 mV into 47k ohms. Frequency response runs 10 Hz to 65 kHz (-3 dB, line). Signal-to-noise is 86 dB, channel separation is 60 dB, and the tone controls offer ±10 dB at 100 Hz and 10 kHz. Weight is listed at 7.6 kg, and the amp was sold with a multi-voltage power supply (AC 120/220/240 V, 50 Hz). The manual also names a handful of features Luxman was pushing at the time - CD straight, a Line Phase Sensor, a high-capacity supply, and an oversized heatsink. It also warns that the rear signal-processor jacks need their jumper bars in place or there will be no output at all. That is the kind of thing that sends a used example to a repair bench for no reason.

Anyone comparing the family should know two things. The spec tables in the service manual use a star system to separate the A-321 from the A-331. The A-321 is the 50 W model and the A-331 is the 60 W model, and the semiconductor counts differ between them (8 ICs and 20 diodes for the A-321, 10 ICs and 24 diodes for the A-331). The A-311 shares an owner's manual with the A-321. So the three models are close relatives, not identical twins.

Production years, original price, and country of manufacture aren't in the record. Used examples do turn up. Recent listings have included a European example around €170, a Polish listing at 599 PLN, and an Australian unit described as in very good condition at $210 plus freight. None of that gives the original story.

Known specifications (from the owner's/service manuals):