JBL L112
1980 - 1983
The L112 represented a significant evolution in JBL's L-series, incorporating advanced technologies from their professional line. With its symmetrical mirror-image pair configuration, refined drivers, and improved crossover design, the L112 offered superior imaging and musical expression.
Specifications
| Type | 3-way, 3-speaker, Bass Reflex, Bookshelf |
|---|---|
| Drivers | Woofer: 12" 128H, Midrange: 5" LE5-12, Tweeter: 044 Dome |
| Crossover Frequencies | 1.1 kHz, 3.7 kHz |
| Nominal Impedance | 8 Ω |
| Power Handling | 80W (continuous program) / 100W (IEC Standard) |
| Sensitivity | 89 dB/W/m |
| Dimensions | 362 x 622 x 333 mm (W x H x D) |
| Weight | 25 kg (packed) |
Drivers Used
- Woofer: 128H - 12" (30cm) cone woofer with SFG magnetic circuit and Faraday loop
- Midrange: LE5-12 - 5" (13cm) cone midrange with hard cone paper
- Tweeter: 044 - 1" (2.5cm) dome tweeter with aluminum deposited phenol diaphragm
Key Features
- SFG Magnetic Circuit: The 128H woofer featured JBL's Symmetrical Field Geometry magnetic circuit for reduced distortion
- Faraday Loop: A high-conductivity ring attached to the pole piece stabilized magnetic flux and reduced second harmonic distortion
- Mirror-Image Pair: The symmetrical driver arrangement provided more accurate sound localization
- Level Controls: Continuously variable attenuators for midrange and high-frequency drivers
- Isolated Midrange: Fully enclosed back cavity prevented rear interference with the woofer
Historical Context
Launched in 1980 at ¥149,000 per unit in Japan, the L112 was part of JBL's late-1970s L-series refresh that included the L15, L26, L46, L56, L86, L96, L150, and flagship L250. These designs featured ceramic magnet woofers, updated midrange drivers, and aluminum-deposition phenolic resin tweeters - marking a transition from the Alnico magnet era.
The L112 bridged the gap between the classic L100 lineage and the more modern designs of the 1980s, making it a favorite among collectors who appreciate both vintage character and refined performance.