Luxman M-150 ()
A solid-state stereo power amplifier introduced in 1973, built for high-fidelity pairing with Luxman’s flagship preamps of the era.
Overview
The Luxman M-150 is a solid-state stereo power amplifier introduced in October 1973, designed as a high-performance companion to models like the CL-350 preamplifier. With a rated output of 75 watts per channel into 8 ohms (both channels driven), it offered substantial power for its time while maintaining exceptional linearity and low distortion. The amplifier features a fully complementary symmetry direct-coupled circuit with a dual-rail power supply, contributing to its stable and transparent sound. It was part of a lineage that included the later M-1500—an exact equivalent—and influenced the design of the M-1600.
Despite strong performance credentials, the M-150 sold modestly compared to other Luxman models like the M-2000 and M-4000. It was housed in a wood enclosure and built around a hermetically sealed IC core LUX transformer, two 10,000µF computer-grade capacitors, large dual heatsinks, and high-speed power transistors. The unit includes dual protection relays, plug-in circuit boards on some versions, fast 2ms VU meters, and selectable fixed or variable inputs, reflecting Luxman’s attention to both performance and serviceability.
Specifications
| Manufacturer | Luxman |
| Product type | Solid State Stereo Power Amplifier |
| Power output | 75 + 75 Watts (8 Ω, both channels driven) |
| Power output | 90 + 90 Watts (8 Ω, single channel driven) |
| Frequency response | 7 Hz ~ 100 kHz (+0 / -1 dB) |
| Power bandwidth | 10 Hz ~ 50 kHz (-3 dB, 0.05% THD) |
| Total harmonic distortion (THD) | < 0.003% (8 Ω, 75W) |
| Intermodulation distortion (IMD) | < 0.003% (8 Ω, 75W, 70 Hz : 7 kHz = 4:1) |
| Signal-to-noise ratio | < 0.5 dB (A-weighted, input shorted) |
| Crosstalk | > 70 dB |
| Input impedance | 270 kΩ + 180 pF (fixed) |
| Input impedance | 80 kΩ ~ 100 kΩ + 180 pF (variable) |
| Slew rate | 20 V/µs |
| Damping factor | 70 (8 Ω, 1W up to 40 kHz) |
| Subsonic filter | 12 dB/octave below 13 Hz |
| Power consumption | 280 W (max), 30 W (no signal) |
| Dimensions (WxHxD) | 476 x 244 x 182 mm |
| Weight | 15.5 kg |
Design
The M-150 uses a fully complementary symmetry direct-coupled circuit topology with a stabilized dual-rail power supply, enhancing DC stability and reducing distortion. It features high-input impedance (250 kΩ), fast 2ms VU meters, and dual protection relays for speaker safety. The internal layout includes plug-in circuit boards on certain versions, aiding in servicing and upgrades. The amplifier is built around a hermetically sealed IC core LUX transformer and two 10,000µF computer-grade capacitors, delivering robust power reserves. Large dual heatsinks manage thermal loads from the high-speed power transistors used in the output stage.
Context
The M-150 was positioned as a premium amplifier in Luxman’s 1970s lineup, intended to pair with high-end preamplifiers like the CL-350 to form a complete 221,000 ¥ stereo system—4,000 ¥ less than the M-2000. Though technically advanced, it sold poorly compared to its siblings. A successor version, the M-1500, was produced after 1975 and was functionally identical. Design elements also carried over into the M-1600, indicating its role as a technological bridge within the product family.
Market
The median market price for the Luxman M-150 in 2026, based on four trusted listings, reflects its niche status among vintage audio collectors. One listing noted a technical condition rating of 10/10, with an asking price of 150 EUR (buyer pays shipping), while another listed it at 45,000 CZK, indicating regional variation in valuation.
eBay Listings
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