HPD3635 vs HPD4739-B — Compare
Cinema 3635 LC-SUB,18" Pro System vs JBL 4739 Dual-15 LF Bass Section Only (HPD4739) - Cinema ScreenArray B-Stock
The Cinema 3635 LC-SUB is a complete, ready-to-install 18-inch subwoofer for behind-screen placement, while the 4739 is a dual-15-inch bass section only—requiring a separate mid/high-frequency cabinet to function as a full speaker system. Choose the 3635 for standalone low-end reinforcement; choose the 4739 if you're building or expanding a modular ScreenArray cinema system.
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JBL 4739 Dual-15 LF Bass Section Only (HPD4739) - Cinema ScreenArray B-Stock
Specs side by side
| Cinema 3635 LC-SUB,18" Pro System | JBL 4739 Dual-15 LF Bass Section Only (HPD4739) - Cinema ScreenArray B-Stock | |
|---|---|---|
| Price | $1,390.00 | $1,344.00 |
| Brand | JBL | JBL |
| Speaker Type | Subwoofer | Subwoofer |
| Install Type | Installed | Installed |
| Condition | New | Refurbished |
Why choose Cinema 3635 LC-SUB,18" Pro System
- ✓ Complete standalone subwoofer—no additional components needed
- ✓ Shallow 14.5-inch cabinet depth fits behind projection screens
- ✓ Barrier strip screw terminals for permanent professional installations
- ✓ Single driver simplifies setup and integration
Why choose JBL 4739 Dual-15 LF Bass Section Only (HPD4739) - Cinema ScreenArray B-Stock
- ✓ Dual 15-inch drivers with Differential Drive topology reduce distortion
- ✓ Higher sensitivity (104 dB) and power handling (up to 800 W)
- ✓ Part of modular ScreenArray ecosystem—combines with M/HF sections
- ✓ B-Stock pricing provides savings on fully functional cinema-grade equipment
Frequently asked questions
Is the 4739 a complete speaker?
No. The 4739 is a bass section only and must be paired with a matching mid/high-frequency cabinet (sold separately) to function as a full loudspeaker system. The 3635 LC-SUB is a complete, standalone subwoofer.
Which fits better behind a projection screen?
The 3635 LC-SUB is purpose-designed for behind-screen placement with a shallow 14.5-inch depth. The 4739 is deeper and intended as part of a modular ScreenArray array, typically installed above or below the screen as part of a larger system.
What is B-Stock on the 4739?
B-Stock means the unit is fully functional with manufacturer warranty but may have open-box history or minor cosmetic handling marks. It is not a defect—only its packaging or appearance, not performance.
Which has more bass output?
The 4739 offers higher sensitivity (104 dB) and greater power handling (up to 800 W) via dual 15-inch drivers with advanced Differential Drive design. The 3635 LC-SUB delivers 125 dB SPL from a single 18-inch driver, optimized for controlled theatrical response rather than maximum output.