JBL 3115A
Documentation on the JBL 3115A is thin. Almost everything known comes from a single Polish database listing. The record shows a 3-way, 3-driver bass-reflex loudspeaker system built around the LE15A 15-inch woofer, with an LE5-6 midrange and an LE20-1 tweeter. Crossover points were 800 Hz and 8 kHz. Frequency response was rated at 28-18,000 Hz, and recommended amplifier power was 50-100 W. The vented enclosure used roughly 4-inch ports. An LC crossover network gave selectable tweeter and midrange attenuation through a front-mounted switch.
Period trade coverage places the 3115A in JBL's Professional Series frequency-dividing network lineup. Mix magazine (February 1984, p.132) noted the introduction of the 3110A, 3115A, and 3120A, each with a three-position high-frequency equalization boost. The 3115A is described as the passive/consumer counterpart to the JBL 4315 studio monitor. It shares that model's LE15A/LE5-6/LE20-1 driver complement in a similar vented enclosure.
No production years, original price, dimensions, weight, sensitivity, or impedance figures have survived in the research. There are no user reviews or current market data either.
Known specs:
- Type: 3-way, 3-driver bass-reflex loudspeaker system
- Woofer: LE15A 15-inch
- Midrange: LE5-6
- Tweeter: LE20-1
- Crossover frequencies: 800 Hz / 8 kHz
- Frequency response: 28–18,000 Hz
- Recommended amplifier power: 50–100 W
- Enclosure: vented, with approximately 4-inch ports
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