Luxman L-80V
A solid-state stereo integrated amplifier built by Luxman during the late 1970s with a detailed capacitor layout and serviceable design.
Overview
The Luxman L-80V is a stereo integrated amplifier. It delivers 50 watts per channel into 8 ohms with a total harmonic distortion of no more than 0.05% and a damping factor of 40 at 8 ohms. Described as a "gorgeous" example of Luxman's engineering from the period, A service manual is available, supporting restoration and maintenance.
Specifications
| Power output | 50 watts per channel into 8 ohms |
| Total harmonic distortion | no more than 0.05% |
| Damping factor | 40 at 8 ohms |
Design
The main amplifier circuit uses 2 solid tantalum capacitors (C101a, C101b) in the signal path and 12 aluminum electrolytic capacitors. The equalizer amplifier circuit includes 2 solid tantalum capacitors (C201a, C202b) and 2 low-leakage e-caps (C202a, C202b) at the input. The filter & boost amplifier board has 4 solid tantalum caps (C301a, C301b, C308a, C308b) and 7 aluminum e-caps. The tone control amplifier board includes 4 solid tantalum caps (C405a, C405b, C409a, C409b) and 3 aluminum e-caps. The original speaker protection relay was replaced with an Omron MY2-02-DC24, and original trimming resistors were upgraded to Bourns potentiometers.
Market
Original solid tantalum and aluminum capacitors across all major circuit boards have been commonly replaced during restoration with modern Nichicon UKL, UPW, UPM, and WIMA film capacitors. A reported issue includes high DC offset, with one unit measuring 174mV on the left channel. Some owners report recurring failures in output and driver transistors, along with resistor R121 and R122, under light load.
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