The Luxman M-900u is one of those rare solid-state flagships that makes you forget you've been pining for tubes — an enormous, imposing machine that somehow sounds utterly effortless. Built around ODNF 4.0 and a 4×2 bipolar push-pull output stage fed by a 1,250VA transformer, it delivers authority that never tips into aggression: bass with real weight and pitch definition, a midrange full of texture and dimensionality, and a high end that simply extends without ever hardening. The illuminated analog meters add a theatrical, almost ceremonial quality to listening sessions, dancing quietly in the Class A zone at everyday levels. Discontinued in 2021 and succeeded by the M-10X, the M-900u stands as the fully matured expression of Luxman's 'u-series' engineering philosophy — and used prices keep reminding you just how hard this kind of sound is to find at any price.
Production
2014-2021
Condition
9.5/10
Serial No.
M91100084B
Orig. MSRP
$19,900
Restoration
- Spec is 150W @ .008% THD / measured 165W @ .008% THD (8ohm)
- Buttons/lights/meters all good
- Thoroughly Detailed
Factory Specs
Continuous Rated Output (Stereo) 150W + 150W (8Ω); 300W + 300W (4Ω)
Continuous Rated Output (BTL Mono) 600W (8Ω)
Instantaneous Maximum Output (Stereo) 1,200W + 1,200W (1Ω)
Instantaneous Maximum Output (BTL Mono) 2,400W (2Ω)
Class A Operating Threshold Up to 12W into 8Ω (meter reads approximately −10dB at this level)
Amplification Circuit ODNF (Only Distortion Negative Feedback) version 4.0
Output Stage Configuration Bipolar transistor, 4-parallel push-pull × 2 modules per channel (4×2)
Input Sensitivity 1.24V / 150W (8Ω); Voltage Gain: 29.0dB
Input Impedance Unbalanced: 51kΩ; Balanced: 34kΩ
Frequency Response 20Hz–20kHz (+0/−0.1dB); 1Hz–130kHz (+0/−3.0dB)
Total Harmonic Distortion 0.008% or less (1kHz / 8Ω); 0.1% or less (20Hz–20kHz / 8Ω)
Signal-to-Noise Ratio (IHF-A) 117dB
Damping Factor 710
Power Transformer EI-type super-regulation, 1,250VA
Filter Capacitors 20,000μF × 4 (large-capacity block capacitor bank)
Power Consumption 540W (maximum); 280W (no signal); 1.0W (standby)
Dimensions 17.32" × 8.82" × 19.09" (W × H × D; converted from 440 × 224 × 485 mm; depth figure includes 2mm front knob and 38mm rear terminals per Luxman specification)
Weight 105.8 lbs (48.0 kg)
Accessories Included Dedicated remote cable, custom-made power cable
Documentation
Luxman M-900U Owner's Manual
The History of Luxman
LUXMAN started its business in 1925, the year when radio broadcasting started in Japan. The company called Kinsuido, a picture frame company in Osaka, made a radio department, which later became LUX. Kinsuido was the first company to display and sell radio receiving equipment at the stores. A lot of people stopped to ...
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Liner Notes
The stereo power amplification, M-900u, has been created to bring out the best sound expression from the speaker system. The rich gradation sound quality has been achieved from deep bass sound to clear high tone with sufficient drive force acquired by connecting the 4-parallel push-pull structural output units in parallel. Luxman's original ODNF circuit that provides both a lively feeling and ultra-low distortion has been evolved to the latest version 4.0. The transparent large analog meter produces the enjoyment of listening to music with finesse, and the exterior design with blasted white finishing encloses high power gently. The BLT connection allows the user to use the unit as an ultra-high power monaural amplifier of 600W (8Ω).
Shipping
To ensure safe arrival, we often use private couriers. These are transporters in Sprinter Vans or pulling covered trailers often moving art and antiques across the country. Absolutely the safest way to ship short of you picking it up yourself. This piece ships to the contiguous United States for a flat rate of $380, which includes our packaging and our insurance. Of course, we'll ship anywhere in the world, just drop us a line and we'll give you an estimate – even if you're just curious.
Stock No.
15395158065373
