JBL 2290 (c. 1976)
A 38 cm cone-type passive radiator designed to enhance low-frequency impact in sealed enclosures paired with 2205 or 2215 woofers
Overview
The JBL 2290 is a passive radiator engineered for high-output bass performance in large sealed enclosures. Manufactured around 1976, it was designed specifically to work with JBL’s 2205 or 2215 woofers, enhancing the dynamic range and impact of frequencies below 150 Hz. Unlike ported systems, this unit enables deep, controlled bass extension without a vent, relying instead on a mass- and compliance-tuned cone assembly. It was used in systems like the JBL L220, where low-end authority was critical. Marketed at ¥18,100 per unit in Japan around 1976, the 2290 reflects JBL’s professional-grade approach to bass reinforcement in high-fidelity speaker design.
Specifications
| Diameter | 38 cm |
| Depth | 8.6 cm |
| Weight (packed) | 1.6 kg |
| Model rating type | 38 cm cone type passive radiator |
| Combined speaker | 2205, 2215 |
| Recommended enclosure volume | 142L ~ 227L |
Design
The JBL 2290 consists of a paper cone and frame assembly with carefully adjusted mass and compliance, allowing it to resonate in response to internal cabinet pressure without a motor or voice coil. It functions as a tuned mass-spring system, augmenting bass output in sealed enclosures by efficiently coupling low-frequency energy into the listening environment.
Context
The 2290 was designed for use with JBL 2205 or 2215 woofers, suggesting its role in professional or high-end consumer systems requiring extended, impactful bass. Its integration into the JBL L220 system highlights its application in larger, performance-oriented speaker designs of the mid-1970s.
Market
Recent listings show the JBL 2290 selling between $115 and $157, with units described in excellent condition. While originally priced at ¥18,100 around 1976, current resale activity indicates continued interest among vintage audio builders and restorers.
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Related Models
- JBL 4310 (1970)
- JBL 4315 Control Monitor (1977)
- JBL L110A (1975)
- JBL 4311B (1975)
- JBL 4408 (1975)
- Akai AM-2850 (1975)
- Akai AP-206 (1975)
- Nakamichi BX-1 (1985)
- Acoustic Research research-ar-17 (1978)
- Acoustic Research AR-19 (1994)