GML 480L
A name that turns up in the racks of serious rooms - and almost nowhere in the paperwork.
Overview
The GML 480L has no surviving manufacturer literature in the archive. No spec sheet, no owner's manual, no confirmed production dates, no original price. What exists instead is a trail of period studio inventories that place a "480L" in professional outboard racks through the late 1980s and into the 1990s. That's all of it. Anyone chasing this one is chasing a designation as much as a documented product.
The most concrete early sighting is a Southern California facility's gear list in Mix (September 1988, p.208). It names a Lexicon 480L digital reverb among the outboard in a 24-track-plus room. A few years later, a Tokyo studio's specified outboard in Studio Sound (September 1993, p.70) includes a 480L sitting next to a Lexicon 224XL and a GML 8900. Both are directory entries, not reviews. They show that a 480L was in working professional use, and nothing more about how it was built or what it measured.
The second listing is the crux of the problem. The 480L name is overwhelmingly associated with Lexicon's digital reverb, and the 1988 listing pairs the designation with Lexicon outright. The 1993 Tokyo entry is more ambiguous. It lists a 480L alongside both a Lexicon 224XL and a GML 8900, which could support a GML unit, a Lexicon unit, or a transcription that blurred the two. The surviving record does not settle whether the GML 480L is a distinct GML product, an OEM or rebadged unit, or a misattribution carried forward in the source material. This archive will not guess. If you own one, or have a rear-panel photo or a manual, please put it on the record.
What can be said with confidence is narrow. The unit appears in professional studio inventories from the late 1980s through the 1990s, and it is consistently catalogued as a digital reverb. Beyond type and period of use, the documentation runs dry: no confirmed production years, no price history, no specifications, no known failure modes, no established market values. Treat any listing that quotes hard numbers for a "GML 480L" with suspicion until a primary document surfaces. The number may well belong to the Lexicon of the same designation.
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