JBL G135-8 (circa 1987–1988)
The JBL G135-8 is a 38 cm (15-inch) cone woofer, developed for musical instrument applications. Documentation is thin, but the manufacturer-level spec sheet that survives gives a clear picture of the electrical and mechanical parameters.
It is an 8 Ω driver. Allowable input is 200W continuous program, output sound pressure level is 104 dB/W/m, and the frequency characteristic runs from 50 Hz to 6 kHz. Resonant frequency (fo) is 45 Hz. The only dimension recorded is depth, at 162 mm. JBL used its low-distortion SFG magnetic circuit and related technologies to get high efficiency and high input resistance while keeping the sound clear.
The pricing record is a little muddled. One source lists the G135-8 at ¥51,000 per unit around 1987, and another lists it at ¥46,000 per unit around 1988. Both figures come from the same database, and nothing else exists to reconcile them.
- Type: 38 cm cone woofer (developed for musical instruments)
- Impedance: 8 Ω
- Allowable input: 200W (continuous program)
- Output sound pressure level: 104 dB/W/m
- Frequency characteristic: 50 Hz – 6 kHz
- fo: 45 Hz
- Depth: 162 mm
Almost nothing else is recorded. There are no production years beyond the circa 1987 - 1988 pricing dates, no weight, no voice coil diameter, no magnet details, and no information on which JBL systems, if any, used this driver. A single used listing in the San Jose area asked $140 for a working example. That is the whole market record.
Similar items on eBay
No exact JBL G135-8 listings are live right now — these searches show current JBL and similar vintage audio gear on eBay:
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.
Related Models
- JBL 075
- JBL 077
- JBL 120Ti
- JBL 124A
- JBL 124H
- Braun AUDIO-1 (1965)
- Braun AUDIO-250 (1965)
- Magnavox Component Systems (1972)
- Acoustic Research AR (1967-1976)
- Acoustic Research 11