Luxman LE109
A phono preamplifier built for the CD age, and the only way to keep vinyl alive in a system that had abandoned it.
Overview
The Luxman LE109 is a standalone phono preamplifier. It exists because of a decision Luxman made in the late 1980s: the company's integrated amplifiers of that period shipped without phono inputs, and the LE109 was the companion component that let vinyl owners add the missing stage back. Audio (September 1987, p.63) noted that Luxman had deliberately separated low-level preamplification and record equalization from high-level signal handling, and that the LE109 "can be added, if desired" by listeners who still had a turntable. For anyone who planned to listen only to CDs, radio, and tape, Luxman left the phono circuit out entirely to keep costs down.
The LE109 is not a flagship phono stage with adjustable loading and exotic parts. It's a practical, well-built add-on for a specific generation of Luxman integrateds that lacked a phono section. The service documentation shows a fairly conventional circuit: dual M5220L op-amps (IC2101 and IC2102) handle the main gain stages, a NJM7812 voltage regulator (IC1101) sits in the supply, and 2SC1815 and 2SA1015 transistors are scattered across the main board. For the moving-magnet input, Luxman used a pair of 2SK170 FETs (Q2201 and Q2202) alongside 2SJ74 FETs (Q2203 and Q2204). A JFET front end was a common and sensible choice for low-noise phono amplification in this era.
The parts list shows how Luxman built it. The main filter capacitors are 1000 µF/63V electrolytics, and the signal path uses polyethylene film capacitors, including 3300 pF units at C2123 and C2124, rather than cheaper ceramics. That's not audiophile exotica, but it separates a competent budget component from a careless one. The unit also has a dedicated subsonic filter (switch S2103, labeled "PUSH SWPJ 220 Subsonic"), which helps with footfall or warped records. There's also an attenuate switch (S2201), a sensitivity switch (S2101), and an impedance switch (S2102) for matching different cartridges.
The LE109 was sold in multiple voltage variants for different markets. The service manual lists four versions: a 100V Japanese model, a 120V North American model, a 220V West German model, and a 220V "general foreign" model. The transformers differ between these versions (T1001 and T1002 carry different part numbers depending on region), and the fuse values change accordingly. The Japanese version uses a 0.5A-125V fuse, while the 220V versions use a SEMKO T-200mA fuse. The North American and European versions also include a voltage selector switch (S1002) that the Japanese model lacks. Anyone buying one used should check which variant they're getting. A 100V Japanese unit plugged into a 120V wall outlet won't last long.
Cosmetically, the parts breakdown lists a front escutcheon, function knobs, a power knob, and a push knob — standard Luxman fare of the period, with the kind of clean industrial design the company was known for in the late '80s. The rear cover and top cover are listed as separate assemblies, and the front panel is a complete assembly (01V83300F58 for most markets). There's not much to go wrong cosmetically, which is good news for anyone hunting one today.
The LE109 is not a high-end phono stage, and it's not a universal solution. It was designed to pair with specific Luxman integrated amplifiers that lacked phono inputs, and it does that job well. Anyone running a modern system with a moving-coil cartridge who needs adjustable loading will want something else. With a Luxman integrated from the late '80s and a moving-magnet cartridge, it fits.
The main things to check are the voltage variant (make sure it matches your local mains), the condition of the electrolytic capacitors (they're decades old at this point and may need replacement), and whether the original power cord and fuse holder are intact. The service manual's parts list documents every component by part number, which makes restoration straightforward for anyone with basic soldering skills.
The LE109 is a reminder that the transition from vinyl to CD wasn't a clean break. Luxman built amplifiers that assumed you'd moved on, and then built a small box for the people who hadn't. That's a specific moment in audio history, and the LE109 is one of the more interesting artifacts of it.
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