JBL 122A / 122A-1 Woofer
1975-1980
The 122A was an improved 12" woofer featuring a mass control ring for enhanced low-frequency performance. Used in the L166 Horizon, it represented an evolution of the L65 woofer design with refined transient response.
Specifications
| Nominal Diameter | 12" (30cm) |
|---|---|
| Magnet Type | Alnico V |
| Voice Coil | 3" (75mm) edgewound aluminum |
| Cone Material | Paper with proprietary coating |
| Impedance | 8 Ω |
| Power Handling | 75W continuous |
| Sensitivity | 89 dB/W/m |
Key Features
- Mass Control Ring: Voice coil enhancement for improved transient response and reduced distortion
- Alnico V Magnet: Premium magnet material for flux stability
- Improved Cone Design: Refined from the L65 woofer lineage
Applications
- L166 Horizon (1975-1980)
Variants
- 122A: Original version (1975)
- 122A-1: Later production revision with minor improvements
Documentation
- JBL Loudspeaker Components 1979 Catalog - Contains 122A specifications
- JBL Thiele-Small Parameter Manual (PDF) - Technical reference for woofer parameters