JBL 3739 Dual-15 LF Bass Section (HPD3739) – Professional Low-Frequency Foundation Cabinet
The JBL 3739 is a purpose-built low-frequency bass cabinet engineered for controlled, efficient bass reproduction in professional installations where precision and output are non-negotiable. This component serves as the foundation of the JBL ScreenArray family, providing the tight, articulate low-end foundation that critical listening and playback environments demand.
Acoustic Performance
Dual M115-8A 15-inch woofers with 64 mm edgewound ribbon voice coils deliver a free-field sensitivity of 104 dB SPL at 2.83 V / 1 m, ensuring powerful low-end output without excessive amplifier demand. The cabinet is tuned for a 40 Hz to 2 kHz frequency response, integrating seamlessly with professional mid/high-frequency sections to create a cohesive, extended full-range system.
Electrical & Physical Specifications
The 3739 presents a 4 ohm nominal impedance (minimum 3.5 ohms at 195 Hz) and handles 500 W input power, with 600 W recommended amplifier rating. Connection is via rugged push-terminal binding posts, and the compact footprint of 883 × 762 × 450 mm (34.75 × 30 × 17.75 inches) allows integration into diverse studio, control-room, and monitoring installations.
Key Features
- Dual 15-inch (380 mm) woofers with 2.5-inch (64 mm) edgewound ribbon voice coils
- Mounted in JBL 4509 low-frequency enclosure
- Nominal impedance: 4 ohms (minimum 3.5 ohms at 195 Hz)
- 500 W input power handling; 600 W recommended amplifier
- Free-field sensitivity: 104 dB SPL (2.83 V / 1 m)
- Frequency response: 40 Hz – 2 kHz
- Dimensions: 883 × 762 × 450 mm (34.75 × 30 × 17.75 in)
- Push-terminal binding posts for secure connections
- Component bass cabinet only; requires separate HF or M/HF top section
- Compatible with JBL 3722, 3722N, 3730, and 3732 ScreenArray systems
- Harman Professional Cinema specification
- Limited Quantity availability
The 3739 delivers the controlled low-frequency foundation professional monitoring and playback systems demand—a pure bass cabinet with no compromises in efficiency or integration capability.
