JBL 2115H/2115J (1980)
The JBL 2115H/2115J is a 20 cm (8-inch) cone-type full-range driver introduced in 1980. It was originally priced at ¥40,000 per unit. It came in two impedance variants, the 2115H at 8 Ω and the 2115J at 16 Ω, so it fit different amplifier and system setups. JBL rated it for 50W continuous program input, with a sensitivity of 92 dB/W/m and a frequency band of 40 Hz to 15 kHz. The resonance frequency (fo) is 55 Hz. The magnet structure produces a flux density of 8,500 gauss, and the driver weighs 3.4 kg with a depth of 9.8 cm.
JBL positioned this as a versatile unit for professional applications. It noted uniform characteristics across 8 octaves, and said the driver suits PA line arrays or single monitors in bass-reflex enclosures of 28 to 56 liters internal volume. The design dates from the period when JBL was moving from Alnico to ferrite magnets - one owner recalls buying the 2115H "right after" that shift. That same owner notes the foam surround is prone to deterioration over decades, which fits the materials of the era. Reconing services and foam surround replacement kits are available for both the 2115H and 2115J from specialty suppliers, and the related model 2115A shares the same surround parts.
Documentation on the 2115H/2115J is thin beyond its listing in period Japanese audio directories. No formal professional reviews of the driver have surfaced. Total cabinet dimensions, production end year and broader lineup placement remain unrecorded. It is a full-range driver from JBL's professional line, and it still finds use in PA and monitor applications today.
- Type: 20 cm cone full-range unit
- Impedance: 2115H — 8 Ω; 2115J — 16 Ω
- Input (continuous program): 50W
- Sensitivity (new JIS): 92 dB/W/m
- Frequency band: 40 Hz – 15 kHz
- fo: 55 Hz
- Magnetic flux density: 8,500 gauss
- Recommended enclosure: 28 – 56 L, bass-reflex
- Depth: 9.8 cm | Weight: 3.4 kg
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