JBL Woofers
JBL woofers are renowned for their high efficiency, low distortion, and exceptional transient response. From the classic Alnico-era designs to the innovative SFG magnetic circuits, these drivers defined the "West Coast Sound."
12-Inch Woofers
1970-1978
123A
The legendary 12" woofer from the L100 Century. Alnico V magnet, white cone with distinctive aqua-pus treatment.
1975-1980
122A / 122A-1
Improved 12" woofer with mass control ring. Used in L166 Horizon. Evolved from the L65 woofer design.
1978-1985
128H / 128H-1
Ferrite magnet 12" with SFG magnetic circuit and Faraday loop. Used in L112, L150, L96.
1978-1983
2213H
Professional-grade 12" woofer with Lancer Plus cone coating. Found in 4311B studio monitors.
15-Inch Woofers
10-Inch Woofers
Key Technologies
| Technology | Description | Used In |
|---|---|---|
| Alnico V Magnets | Aluminum-Nickel-Cobalt magnets for high flux density and transient response | 123A, 122A, 136A |
| SFG (Symmetrical Field Geometry) | Ferrite magnetic circuit with symmetrical flux distribution for low distortion | 128H, 2213H |
| Faraday Loop | High-conductivity ring to stabilize magnetic flux and reduce harmonic distortion | 128H series |
| Mass Control Ring | Voice coil enhancement for improved transient response | 122A |
| Lancer Plus Coating | Proprietary cone treatment for optimal mass and rigidity | 2213H |
| Edgewise Wound Voice Coil | Copper ribbon wound on edge for improved heat dissipation | 128H, 2213H |