JBL LE20 Tweeter
1970-1972
Born in the golden era of American hi-fi, the JBL LE20 was the spark plug of the legendary L100 Century. This tiny 1.5-inch cone tweeter didn’t just handle the highs—it gave the L100 its voice, delivering a crisp, present, and unmistakably lively top end that cut through with clarity and character. No sterile sheen here: this was high-frequency reproduction with attitude.
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. Instead, they doubled down on their cone heritage with the LE20—a small but mighty high-frequency driver built for presence and punch. While domes would eventually dominate for their smooth dispersion and extended highs, the LE20 carved its niche with a raw, forward character that many audiophiles still describe as “alive.” It wasn’t about neutrality—it was about energy, immediacy, and a touch of rock-and-roll flair.
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. But for collectors and vintage purists, the LE20 remains the authentic voice of the original Century—rare, sought-after, and full of vintage soul.
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- Lansing Heritage - Comprehensive JBL specifications, photos, and historical documents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
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