JBL 2392 (1980s)
The JBL 2392 is a bi-radial horn for professional sound reinforcement. It belongs to JBL's 23xx series of constant-directivity horns from the 1980s. It was built for 2-inch exit compression drivers and saw service in cinema and sound reinforcement.
The horn is molded of high-grade phenolic resin and has an ultra-wide flare with 90° horizontal by 40° vertical coverage. JBL's literature describes bi-radial horns as designed for constant directivity, and the 2392's waveguide design gives smooth off-axis response with wide horizontal coverage. It mounts onto the 2388 ring with two mounting studs. In JBL's horn lineup, the 2392 sat below the 2394.
Known specifications from the JBL Professional Product Guide:
- Frequency response: 500 Hz – 16 kHz
- Coverage: 90° × 40°
- Directivity index: 12 dB
- Crossover frequency: 800 Hz
- Power handling: 75W minimum, 400W maximum
- Dimensions: 27" H × 10.5" W × 27" D
- Weight: 15 lbs
The record on this horn is thin. No original price, no specific compatible driver model names and no owner reviews have surfaced. Production timing is also uncertain, with sources conflicting between the late 1970s and the 1980s. The 2392 was a workhorse component, not a consumer product, aimed at installations where controlled coverage and high output mattered more than domestic looks. Period classifieds in Audio (June 1987, p.167) show used JBL professional gear changing hands regularly, though the 2392 itself rarely appears in those listings.
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