JBL LE85 Compression Driver
1969 - 1985
The JBL LE85 is a legendary 1-inch throat compression driver that brought professional horn-loaded performance to home hi-fi systems. Best known as the high-frequency heart of the iconic L200 and L300 speakers, the LE85 delivered studio-quality dynamics and clarity to discerning listeners.
Specifications
| Type | 1-inch throat compression driver |
|---|---|
| Diaphragm | 3-inch diameter aluminum with tangential suspension |
| Voice Coil | 1.75-inch edge-wound aluminum |
| Magnet | Alnico V, 2.0 lbs |
| Throat Diameter | 1 inch (25mm) |
| Frequency Response | 800 Hz - 17 kHz |
| Sensitivity | 108 dB @ 1W/1m |
| Power Handling | 25W continuous program |
| Nominal Impedance | 8 Ω |
| Weight | 4.5 lbs (2.0 kg) |
Design Overview
The LE85 was developed as the consumer/hi-fi version of JBL's professional 375 compression driver. While the 375 was designed for studio monitors and cinema systems, the LE85 was specifically voiced for home listening environments. Both shared the same fundamental design, with the LE85 representing JBL's commitment to bringing professional-grade performance to the home market.
Key design features:
- 1-Inch Throat: Compact size ideal for home speaker systems
- Alnico V Magnet: Stable, high-flux magnetic field for precise control
- Aluminum Diaphragm: Lightweight, rigid, and self-damping
- Precision Phase Plug: Computer-designed for smooth frequency response
- Tangential Suspension: Surrounds the diaphragm periphery for pistonic motion
Iconic Applications
The LE85 is most famous for its role in two of JBL's most celebrated home speakers:
- JBL L200 Studio Master: The 12-inch 3-way system that brought studio monitor performance home
- JBL L300 Summit: The flagship 15-inch system using the same driver complement as the L200
Both speakers paired the LE85 with the JBL 2307 short exponential horn, creating a compact yet powerful high-frequency section that delivered the immediacy and dynamics of professional studio monitors.
The LE85 Sound
The LE85 delivered several sonic characteristics that made it special:
- High Efficiency: 108 dB sensitivity meant extraordinary dynamics even with modest amplifiers
- Fast Transients: Light aluminum diaphragm responded instantly to musical signals
- Extended Response: Reached up to 17 kHz for detailed treble
- Low Distortion: Horn loading reduced diaphragm excursion and associated distortion
- Wide Dispersion: When paired with the 2307 horn, provided excellent coverage
Relationship to the 375
The LE85 and 375 were closely related designs. The professional 375 was used in studio monitors like the 4343 and 4350, while the LE85 brought similar performance to home systems. Both used:
- Same 1-inch throat geometry
- Similar Alnico V magnet structures
- Compatible diaphragms
- Comparable sensitivity and frequency response
Compatible Horns
The LE85 was designed to work with specific JBL horns:
- JBL 2307 - Short exponential horn (used in L200/L300)
- JBL 2308 - Bi-radial horn for wider coverage
- Various professional JBL horns with 1-inch throat
Legacy
The LE85 represents a high point in JBL's home audio engineering—bringing genuine professional-grade compression driver performance to consumer systems. Today, vintage LE85 drivers in good condition are highly sought after by JBL enthusiasts and represent one of the most accessible ways to experience classic JBL horn sound.
Restoration
The LE85 can be restored to full working condition:
- Replacement diaphragms available from JBL and aftermarket sources
- Alnico magnets are stable and rarely require recharging
- Phase plug can be cleaned carefully
- Mounting hardware is standard and replaceable
Related Drivers
- JBL 2420 - 2-inch throat professional driver
- JBL 2441 - Large-format 2-inch driver
- JBL 375 - Professional version of the LE85
Market Value
┌──────────────────────────────────────────────────────────────────────────┐ │ JBL LE85 Apr 2026 │ ├──────────────────────────────────────────────────────────────────────────┤ │ High $875 Latest $26 │ │ Median $561 Trend ▼ Down │ │ Low $26 Volume ~4/mo │ ├──────────────────────────────────────────────────────────────────────────┤ │ $900 ┤ │ │ │. . │ │ │ │ │ $514 ┤ . . │ │ │ │ │ │ . . │ │ │ │ │ $0 ┤ .│ │ ├─────────────────────────────────────────────────────────────────│ │ vol │▄ ▄ █ ▄ ▄ ▄│ │ └─────────────────────────────────────────────────────────────────│ │ 2026-01 2026-02 2026-03│ └──────────────────────────────────────────────────────────────────────────┘
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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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