JBL 4739 Dual-15 LF Bass Section Only (HPD4739) - Cinema ScreenArray B
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- HPD4739-B
. Description
JBL 4739 Dual-15 LF Bass Section Only (HPD4739) — Cinema ScreenArray B-Stock
This JBL 4739 is the low-frequency foundation of professional cinema sound systems, engineered to deliver controlled, articulate bass in fixed installations where shallow cabinet depth is essential. As a B-Stock unit, it carries the full manufacturer warranty and is fully functional—the result of open-box inventory or minor cosmetic handling. This listing covers the bass section only; it pairs with a matching mid/high-frequency top section to form a complete ScreenArray system.
Driver Design & Acoustic Performance
The dual 265H-2 380 mm (15 in) Differential Drive woofers with edgewound ribbon voice coils are built for cinema playback, combining high sensitivity (104 dB SPL at 2.83 V / 1 m) with precision low-end reproduction. The Differential Drive topology reduces distortion and increases power handling by mechanically isolating voice-coil motion, a hallmark of JBL's professional transducer engineering.
System Integration & Physical Specifications
Housed in the 4509 LF enclosure, the 4739 presents a 4 ohm nominal impedance (3.3 ohms minimum at 230 Hz) and supports either 500 W (44.5 V) or 800 W (56.5 V) input depending on amplifier output. Its shallow profile—883 × 762 × 450 mm (34.75 × 30 × 17.75 in)—fits behind cinema screens with minimal depth requirements, while push-terminal binding posts ensure reliable integration into installed systems.
Key Features
- 2 × 265H-2 Differential Drive 15-inch woofers with edgewound ribbon voice coils
- 4739 model / HPD4739 Harman part number — cinema ScreenArray low-frequency section
- 4 ohm nominal impedance; 3.3 ohms minimum at 230 Hz
- 500 W (44.5 V) or 800 W (56.5 V) input power handling
- 104 dB SPL free-field sensitivity (2.83 V / 1 m)
- 4509 LF professional cinema enclosure
- Shallow 450 mm (17.75 in) depth for behind-screen installation
- Push-terminal binding posts for secure professional wiring
- B-Stock: fully functional with full manufacturer warranty
- Compatible with JBL 3732T, 3733, 4722, 4722N, 4732, and 4732T ScreenArray systems
- Designed for fixed cinema and high-SPL professional applications
The JBL 4739 delivers the controlled low-end extension and efficient output that cinema and large-venue installations demand, backed by professional-grade construction and full warranty coverage.
As a B-Stock unit it carries a minor cosmetic blemish with no effect on playability, tone or structure, which is why it sells for less than a first-quality unit. It is new, unplayed and covered by the full manufacturer warranty.
More Information
| Condition | Refurbished |
|---|---|
| Country of Manufacture | Mexico |
Reviews
At a Glance
The JBL 4739 is a dual-15-inch bass section designed for fixed cinema and high-SPL professional installations, delivering controlled articulate low-end with 104 dB sensitivity and minimal distortion through precision Differential Drive woofers. This is a bass cabinet only—it pairs with a matching JBL mid/high-frequency top section to form a complete ScreenArray system and is built for venues and installations where shallow depth behind screens is critical. B-Stock means it's fully functional with full warranty and only minor cosmetic wear, making it an excellent value for sound engineers and installers building or upgrading cinema or large fixed-venue systems.
Who This Is For
Great for
- ✓ Cinema Sound
- ✓ Fixed Installation
- ✓ High-SPL Professional Applications
Not the best pick for
- – Portable PA
- – Live Touring
- – Home Audio
Skill level: Professional
Frequently Asked Questions
What is B-Stock and does it affect sound quality?
B-Stock means this unit is fully functional with full manufacturer warranty but carries minor cosmetic handling marks or open-box inventory status. There is no effect on acoustic performance, durability, or functionality—it is new and unplayed, and the price reflects only the cosmetic difference.
Is this a complete loudspeaker or do I need additional components?
This is the bass section only and requires a matching JBL mid/high-frequency (M/HF or HF) ScreenArray top section to create a complete speaker system. It is compatible with the 3732T, 3733, 4722, 4722N, 4732, and 4732T ScreenArray tops and is sold as the bass foundation component.
What power amplifier does it need?
The 4739 accepts 500 W at 44.5 V or 800 W at 56.5 V depending on your amplifier output. It presents 4 ohm nominal impedance (3.3 ohms minimum at 230 Hz) and connects via push-terminal binding posts for secure professional wiring.
How shallow is the cabinet depth and why does that matter?
The 4739 has a shallow 450 mm (17.75 inch) depth, making it ideal for installation behind cinema screens or in venues where cabinet projection is limited. This shallow profile is a signature feature of the ScreenArray design for hidden-speaker cinema installations.
What distortion and sensitivity can I expect?
The 4739 delivers 104 dB SPL free-field sensitivity at 2.83 V / 1 m and uses Differential Drive woofers with edgewound ribbon voice coils to reduce distortion and increase power handling through mechanical voice-coil isolation—a hallmark of cinema-grade transducer design.
Do I pay sales tax on this order?
We collect sales tax only on orders shipped to California. Orders shipped to any other US state are charged $0 sales tax at checkout when you buy direct from our website. On this item that is roughly $94 less out the door than the same listed price at a national retailer or on a marketplace. Marketplaces such as eBay, Reverb and Amazon collect sales tax in nearly every state as marketplace facilitators no matter who the seller is, so the same item at the same price costs less bought direct. Free US shipping and 30-day returns are included. Some states ask buyers to self-report use tax on out-of-state purchases.
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