Luxman P-406
Here is the honest problem with the Luxman P-406: almost nothing is actually documented about it, and even its identity is tangled. The name appears in period material in two very different ways — as a preamplifier, and as part of a family of solid-state flagship headphone amplifiers (the P-406T and P-406S being the variants that actually received coverage). If you are looking for the preamp version, the record is essentially empty: no specifications, no production years, no original price, no design details survive in any source we can find.
What we do know is frustratingly indirect. The preamplifier P-406 appears in exactly one listing, with no supporting detail. The headphone amplifier P-406 is described only as a "solid-state flagship" model, with the substantive technical coverage going to its T and S successors rather than the base unit. Neither variant has documented dimensions, weight, frequency response, or circuit topology.
To make matters worse, most research material under this name actually concerns the Luxman M-406 power amplifier — a 1984 stereo amplifier rated at 170W into 8 ohms (or 210W per a conflicting listing) and 290W into 4 ohms, weighing 25.5kg. That is a different product, and its specifications must not be mistaken for the P-406's. The M-406 is well documented; the P-406 is not.
So the truthful summary is this: the Luxman P-406 existed, in some form, but the archive record on it is thin to the point of near-invisibility. Period HiFi-Stereo reviews from the era focus on turntables, not on this model HiFi-Stereo (February 1987, p.119). If you own one, have a manual, or have seen it listed in a period directory, that would be a genuine contribution to the record.
- Known identity: preamplifier (per one listing) — or possibly a headphone amplifier family (P-406 / P-406T / P-406S)
- No specifications, dimensions, weight, or price documented for any P-406 variant
- No production years confirmed
- Distinct from the Luxman M-406 power amplifier (1984, 170W/8Ω per hifi-wiki)
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