JBL 4375A (c. 1981)
The JBL 4375A is a line-array type speaker system built for sound reinforcement. It was aimed at conference rooms, lecture halls, and small halls where speech intelligibility matters more than full-range music reproduction. It was priced at ¥160,000 per unit around 1981. The record on this model is thin. No production years, no period reviews, and no collector-market data have surfaced, but the basic engineering is clear enough.
It's a 1-way, 4-speaker floor-standing design. It uses four 13 cm cone-type wide-range units (the 2105H) for the speech range. The playback frequency band is listed as 150 Hz to 15 kHz, with a directional characteristic of 120° x 30°. Nominal impedance is 8 ohms, output sound pressure level is a healthy 100 dB/W/m, and allowable input is 200W continuous program. The enclosure is a slim 35 liters, measuring 400 x 762 x 165 mm and weighing 16 kg. The thin profile was a deliberate choice, meant to allow installation in tight spaces. The exterior is finished in gray with a black grille.
That's the whole documented story. The 4375A appears to have been a utilitarian commercial-installation product rather than a consumer hi-fi statement, which likely explains why so little enthusiast documentation exists. It's a purpose-built PA column from JBL's early-80s professional line - efficient, narrow in the vertical plane, and designed to get speech across a room without taking up floor space.
- Type: 1-way, 4-speaker floor-standing line array
- Drivers: Four 13 cm cone wide-range units (2105H)
- Playback band: 150 Hz – 15 kHz
- Impedance: 8 ohms
- Sensitivity: 100 dB/W/m
- Power handling: 200W continuous program
- Dimensions: 400 x 762 x 165 mm (W x H x D)
- Weight: 16 kg
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