JBL 033 Tweeter
1979-1982
The 033 was a dome tweeter with a resin-impregnated linen diaphragm, developed specifically for the L150. Its high end was slightly warmer and more natural than the aluminum-deposited designs.
Specifications
| Type | Dome tweeter |
|---|---|
| Nominal Diameter | 1" (25mm) |
| Magnet Type | Ferrite (Ceramic) |
| Diaphragm Material | Resin-impregnated linen |
| Impedance | 8 Ω |
| Frequency Response | 4 kHz - 20 kHz |
| Crossover | 4 kHz (in L150) |
Key Features
- Linen Diaphragm: Natural fiber base with resin impregnation
- Warm Character: Slightly softer high-frequency presentation
- Ferrite Magnet: Ceramic magnet structure
- Unique Material: Different sonic signature from aluminum-deposited domes
Applications
- L150 / L150A (1979-1982)
Historical Context
The 033 was a detour in JBL's tweeter line. Most of the lineup moved toward aluminum-deposited phenol domes. The 033 kept a linen-based diaphragm, which gave a different flavor of high-frequency reproduction and went with the L150's passive radiator bass system.
Natural fiber (linen) impregnated with resin was another way to get the right stiffness-to-mass ratio. The sound came out slightly more organic and less "hi-fi," which some listeners preferred.
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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- Lansing Heritage - Comprehensive JBL specifications, photos, and historical documents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