JBL LE20 Tweeter
1970-1972
The JBL LE20 was the tweeter in the L100 Century. It is a 1.5-inch cone tweeter, and it gave the L100 a crisp, present, lively top end that cut through the mix.
Specifications
| Type | Cone tweeter |
|---|---|
| Nominal Diameter | 1.5" (38mm) |
| Magnet Type | Alnico V |
| Voice Coil | 0.75" (19mm) |
| Cone Material | Treated paper |
| Impedance | 8 Ω |
| Frequency Response | 7.5 kHz - 15 kHz |
| Crossover | 7.5 kHz (in L100) |
Key Features
- Cone Design: A compact paper cone engineered for high efficiency and quick response
- Alnico Magnet: The Alnico V motor system delivers speed and dynamic punch, contributing to its vivid, immediate sound
- Simple Crossover: Paired with a straightforward 7.5 kHz crossover point in the L100’s 3-way design for seamless integration
Applications
- L100 Century (original version, 1970-1972)
Historical Context
In 1970, JBL wasn't chasing the dome tweeter trend. They stayed with cones and built the LE20, a small high-frequency driver aimed at presence and punch. Domes would eventually dominate for their smooth dispersion and extended highs. The LE20 had a raw, forward sound that many audiophiles still describe as "alive." It wasn't about neutrality. It was about energy and immediacy.
By 1972, the LE20's run was over. It made way for the LE25 in the updated L100A, a tweeter with broader high-frequency reach and a more refined top end. Collectors still seek out the LE20 as the original voice of the Century, and it is rare.
Related Drivers
- LE25 - Successor with extended response
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Documentation
- Lansing Heritage - Comprehensive JBL specifications, photos, and historical documents
- HiFi Engine - JBL manuals, service documents, and brochures
- Audio Karma JBL Forum - Community discussions and restoration guides