Luxman A-331
The record on this model is thin — no production years, original price, or market context have surfaced — but the surviving specification sheet paints a clear picture of a competent, honest amp.
Notably, no 8Ω figure is documented anywhere in the sources, which is unusual and worth flagging if you are matching it to speakers. The amplifier delivers a frequency response of 20Hz to 20kHz ±0.5dB, with THD rated at 0.05% and a signal-to-noise ratio of 105dB — respectable numbers that suggest careful engineering. Input sensitivity is 2.5mV for MM phono and 150mV for line-level sources.
Physically, the A-331 is a compact component: 438mm wide, just 77mm high, and 270mm deep, weighing 6.8kg. It appeared in the pages of Audio (October 1995, p.110) and HiFI-Stereo (November 1995, p.76) in the context of separates and receiver market roundups, though neither publication offered a detailed review of the model itself — it appears in directory-style listings rather than as a featured test subject.
What is genuinely known, in short:
- Frequency response: 20Hz–20kHz ±0.5dB
- THD: 0.05%
- S/N ratio: 105dB
- Input sensitivity: 2.5mV (MM phono), 150mV (line)
- Dimensions: 438 × 77 × 270 mm (W×H×D)
- Weight: 6.8 kg
Missing from the record: production years, original price, 8Ω power rating, damping factor, input/output count, and any owner or reviewer testimony. If you own an A-331 and can fill in any of these gaps, the Archive would welcome the contribution.
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