Luxman G-100
A signal processor Luxman's own manuals name as the equalizer you patch into the processor loop - and that's about all the paperwork will tell you.
Overview
The Luxman G-100 is a signal processor, specifically an equalizer. The most reliable word on it comes not from its own documentation but from the manuals of the components it was designed to sit between. Luxman's own literature for the LV-113 and LV-104u integrated amplifiers names the G-100 as the equalizer you connect through the rear-panel SIGNAL PROCESSOR IN and OUT jacks. So it wasn't a free-floating accessory. It was part of a system Luxman expected owners to build. The amplifiers of that era were wired with jumper pins across those processor jacks so a unit like the G-100 could be dropped in without disturbing the rest of the signal chain.
The surviving documentation doesn't give the usual details. No production years, no power rating, no frequency response, no original price, no physical dimensions. The G-100 shows up in the archival record almost entirely as a supporting player in other components' manuals, which suggests Luxman positioned it as a system accessory rather than a flagship in its own right. The German-language manual for the LV-104u lists it alongside the G-111 and the F-105 surround processor as examples of what the processor loop was for. That is about as close to a product-family statement as the sources get.
For a collector, the thin paper trail cuts both ways. The G-100 is easy to overlook and easy to misidentify. The "G" prefix gets confused with Luxman's G-series integrated amplifiers, and the model number collides with unrelated gear from other makers. On the other hand, the units that turn up are usually still functional, because a signal processor has far less to go wrong than an amplifier or a tuner. The jumper-pin design of the host amplifiers also means a G-100 can be inserted or removed without re-cabling an entire rack, which is why so many of them survived in place rather than being pulled and discarded.
What the manuals do confirm is the connection protocol. The LV-113's documentation tells owners to leave the processor jacks securely jumpered with the supplied pins when the loop is unused, and to remove those pins only when a processor like the G-100 is patched in. Lose the jumper pins and the amplifier's signal path is broken until you find replacements or a workaround. Anyone chasing a G-100 should ask whether the host amplifier's pins come with it. They are model-specific hardware, not something you find in a drawer at a flea market.
Period coverage is just as sparse. The Audio (June 1996, p.79) receivers-and-separates listing is a general category page rather than a G-100-specific review. Even contemporary buyers may have met the unit as part of a Luxman system purchase rather than as a standalone catalog item. The Audio (June 1996, p.79) receivers-and-separates listing is likewise a general category page rather than a G-100-specific review. Neither source gives a spec for this model, and neither should be stretched to imply one.
The G-100 is a documented Luxman equalizer with a confirmed role in the LV-113 and LV-104u signal chains, and essentially nothing else on the record. Treat the amplifier-manual references as the authoritative statement of what the unit is and how it connects. Treat every other claim - year, price, topology, band count - as unverified until a service manual or a period review surfaces.
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