JBL 4430 15-Inch Bi-Radial Studio Monitors Pair- Restored – 1-Year Warranty

JBL Professional Studio Monitor Heritage: Classic large-format monitoring system designed for demanding professional audio environments.

2-Way Studio Monitor Architecture: Large-format woofer combined with a compression-driver horn system.

15-Inch Low-Frequency Driver: Substantial bass transducer designed for controlled, high-output low-frequency reproduction.

Bi-Radial Horn Technology: JBL horn design engineered for broad, controlled sound coverage.

100-Degree Horizontal and Vertical Coverage: Nominal constant-directivity design helps maintain consistent coverage across listening positions.

Titanium Compression-Driver Technology: High-frequency section developed for clarity, dynamic headroom, and professional monitoring.

Front-Panel Frequency Controls: Independent mid-frequency and high-frequency level adjustment.

Bi-Amplification Capability: Factory design supports optional bi-amplified operation with appropriate equipment and configuration.

Classic Large-Format Cabinet Design: The distinctive proportions and front-mounted Bi-Radial horn associated with JBL 4430 monitors.

Professionally inspected, tested, and serviced. Aging or degraded components have been replaced where necessary to restore performance as close as possible to original factory specifications.

Before Restoration

We evaluated the speaker pair with aging cabinet surfaces, scratches, veneer damage, accumulated interior dust, and deteriorated cosmetic details. The bass drivers, compression-driver assemblies, crossover networks, and speaker connections were also identified for inspection.

During Restoration

Driver Testing: We inspected the loudspeaker drivers and checked their electrical condition.

Woofer Inspection: We examined the 15-inch bass drivers, cones, surrounds, and mounting assemblies.

Compression Drivers: We inspected the high-frequency driver assemblies and associated electrical connections.

Bi-Radial Horns: We inspected the horn assemblies and mounting connections.

Crossover Networks: We inspected the dividing networks and checked their accessible electrical components.

Frequency Controls: We inspected and serviced the mid-frequency and high-frequency controls.

Terminals & Wiring: We examined speaker connections, internal wiring, and terminal contact surfaces.

Cabinet Restoration: We addressed surface imperfections and serviced the cabinet finish.

Interior Cleaning: We cleaned accessible cabinet interiors and removed accumulated dust.

Driver Mounting & Seals: We checked mounting points and cabinet sealing surfaces.

After Restoration / Final Testing

We carried out the standard speaker burn-in and operational listening procedures.

We checked both loudspeakers across their operating ranges using test signals and listening evaluation.

The pair was assessed for normal sound output following servicing.

Technical Condition

Professionally refurbished passive studio monitors with a two-way acoustic configuration. The pair has undergone HQaudios speaker inspection and servicing.

Cosmetic Condition

These large-format vintage monitors feature wood-finished cabinets, dark front baffles, prominent circular woofers, and distinctive JBL Bi-Radial horn assemblies. The finish, cabinet edges, front components, and remaining vintage characteristics are shown in the actual product photographs.

QC Summary

Please examine the detailed product photographs for the condition of both cabinets, driver assemblies, and visible surfaces.

Brand: JBL Professional

Model: 4430 Bi-Radial Studio Monitor

Product Type: Passive Studio Monitor Loudspeaker

Speaker Configuration: 2-Way, 2-Driver Bass-Reflex System

Low-Frequency Driver: 15-Inch (380 mm) Cone Woofer

High-Frequency System: Titanium Compression Driver with JBL Bi-Radial Horn

Factory Frequency Response: 35 Hz – 16 kHz (+/-3 dB)

Nominal Impedance: 8 Ohms

Factory Power Capacity: 300 Watts Continuous Program

Factory Sensitivity: 93 dB SPL (1 W / 1 m)

Nominal Horn Coverage: 100 Degrees Horizontal x 100 Degrees Vertical

Factory Crossover Frequency: 1 kHz

Frequency Adjustment: Mid and High Level Controls

Factory Reference Dimensions (Each): 21.75 W x 35.75 H x 15.75 D Inches (552 x 908 x 400 mm), Cabinet Reference

Factory Reference Depth Including Horn: Approximately 18.9 Inches (480 mm)

Factory Reference Weight (Each): 127 lb (57.7 kg)

Cabinet Finish: Wood Tone

Listed Quantity: One Pair (2 Speakers)

The two speaker cabinets pictured in the listing are offered together as one pair.

Speaker stands, amplifiers, cables, and other audio equipment are not included.

Only the items specifically listed above are included.