JBL Professional 3739D - Dual 15" Low Frequency Section for ScreenArray Systems (2-Pack)

JBL Professional 3739D - Dual 15" Low Frequency Section for ScreenArray Systems (2-Pack)

The JBL Professional 3739D is a dual 15" cinema low-frequency module designed for behind-the-screen installation in ScreenArray systems. This version corresponds to the LF section used in configurations such as the 3722/3722N and 3730/3732, and is also commonly referred to as the HPD3739. Featuring dual 380 mm M115H-8A transducers with 2.5" edge-wound ribbon voice coils, it delivers high efficiency, low distortion, and a sensitivity of 104 dB (2.83 V/1 m), delivering high SPL with reduced amplification power. With a 40 Hz to 2 kHz response, a nominal impedance of 4 Ω, and a recommended crossover point of 1.2 kHz, the 3739D ensures strong, controlled low-midrange reproduction in commercial venues and auditoriums. Its 4509 LF enclosure maintains a compact depth (approx. 450 mm), making it easy to mount behind a micro-perforated screen, even in tight spaces. This item is a pack of two (2 x 3739D).

Main features

• Cinema low-frequency section with dual 15" woofers (2 × M115H-8A, 380 mm).
• High sensitivity: 104 dB (2.83 V/1 m) for maximum system efficiency.
• Nominal impedance of 4 Ω and power 500 W AES (recommended amplification: 600 W per unit).
• Frequency response 40 Hz–2 kHz with a crossover frequency of 1.2 kHz towards the treble path.
• Shallow depth 4509 LF enclosure (≈450 mm) optimized for behind-screen installation.
• Designed to integrate with ScreenArray systems such as the 3722/3722N and 3730/3732.
• Rugged construction for continuous use in film production.

Benefits for the professional user

• Powerful and controlled bass with low distortion thanks to edge-wound coils and a large transmitting surface (double 15").
• Energy efficiency : High sensitivity reduces the power required to achieve room reference levels.
• Easy integration with JBL ScreenArray packages, streamlining upgrade or replacement projects.
• Easier installation behind a screen due to the contained depth of the enclosure.
• Consistency of coverage and tonality across tri-, bi-, or passive systems in the ScreenArray range.

Use cases

• Commercial cinema LCR systems and projection rooms with microperforated screens.
• Auditoriums and exhibition facilities requiring LF modules behind the screen.
• Replacing the LF section in existing JBL ScreenArray 3722/3722N, 3730 or 3732 systems.

Pack contents

• 2 × JBL Professional 3739D (dual 15" low-frequency section).

Installation and recommendations

• Mounted behind the screen with the LF module centered relative to the acoustic axis of the corresponding ScreenArray system.
• Recommended amplification per channel: ~600 W at 4 Ω with sufficient dynamic capacity.
• Crossover to the HF path at 1.2 kHz (according to the manufacturer's system design and processing).

Description for projects

Cinema LF section, JBL 3739D (HPD3739), 4 Ω, 500 W AES (600 W recommended), 104 dB sensitivity (2.83 V/1 m), 40 Hz–2 kHz response, 1.2 kHz crossover, two 380 mm M115H-8A transducers with 2.5" edge-wound voice coils, 4509 LF enclosure, dimensions approx. 883 × 762 × 450 mm (H × W × D), net weight per unit 65.8 kg; compatible with ScreenArray 3722/3722N and 3730/3732 systems.