JBL TM630 (c. 1990)
The JBL TM630 is a 3-way in-vehicle speaker unit from around 1990, sold at ¥56,000 per speaker. The record on these is thin. There are no production years, no dimensions, no crossover data, and no formal reviews. What is documented comes mostly from period listings and the Japanese audio database entry.
Here is what is known. The TM630 is a 160mm (roughly 6.5-inch) three-way design with a 4-ohm impedance, a frequency response rated from 50 Hz to 22 kHz, and an output sound pressure level of 91 dB. JBL specified an allowable input of 80W, though some resale listings describe it as 80W RMS / 160W peak. The low range uses a polypropylene cone and the high range a pure titanium diaphragm. The motor uses JBL's low-distortion SFG magnetic circuit with an edge-wise wound voice coil. The midrange driver material isn't documented.
Surviving listings show how these were marketed and received. One Portuguese seller described them as "powerful sound and impressive sonic clarity," and they still turn up on secondhand markets in Japan, Russia, and Europe, often described as vintage items in excellent condition. Beyond that, almost nothing is recorded about the TM630's intended vehicle fitments, its place in JBL's car audio lineup, or how it compared to contemporaries.
Known specs:
- Type: 3-way in-vehicle speaker unit
- Impedance: 4 Ω
- Frequency response: 50 Hz – 22 kHz
- Allowable input: 80W (some listings cite 80W RMS / 160W peak)
- Output sound pressure level: 91 dB
- Driver size: 160mm
- Low range: polypropylene cone; high range: pure titanium diaphragm
- Original price: ¥56,000 per unit (c. 1990)
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