JBL L54 Trimline (1962)
The JBL L54 Trimline is a thin, wall-mountable speaker system that JBL introduced in 1962. Its construction is unusual for the catalog. It isn't a conventional multi-driver enclosure. It's a 1-way, 1-speaker passive radiator system built around JBL's well-regarded LE8T full-range driver, a 20 cm cone unit with a 2-inch aluminum center dome and its own voice coil. The LE8T was praised for its extended high-frequency behavior. A 20 cm cone-type passive radiator (the PR8) handles the low end, which lets the cabinet stay very shallow.
The cabinet measures 500 mm wide, 590 mm high and just 130 mm deep. It's finished in walnut and has wall-mounting hardware on the back, hence the "Trimline" name. It weighs 20 kg. Brass legs were offered separately as the C54-150 foot, which turned the wall-hanging design into a floor-standing one. In Japan the price was ¥67,900 per unit at its 1965 listing, rising to ¥71,000 around 1967. The optional foot was ¥6,600.
Beyond that, the historical record is thin. No frequency response, impedance, sensitivity or power handling figures have surfaced, and there's no documented production end year or lineup positioning. The L54 Trimline appears in period Japanese audio directories, and the LE8T driver has a strong reputation among JBL enthusiasts. The complete system is a relatively obscure entry in JBL's early-1960s output. Examples do turn up on the secondhand market, often as repair or parts units.
- System: 1-way, 1-speaker, passive radiator, floor type
- Full-range driver: 20 cm cone (LE8T)
- Passive radiator: 20 cm cone (PR8)
- Dimensions: 500 × 590 × 130 mm (W×H×D)
- Weight: 20 kg
- Finish: Walnut; wall-mount hardware on back
- Optional: C54-150 brass legs (¥6,600, c. 1967)
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