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JBL SRX728S Dual 18 Subwoofer
The JBL SRX728S Dual 18" Subwoofer is built to deliver smooth, clean, accurate low-end. With a pair of 18" Differential Drive woofers, it handles an amazing 1600W power (continuous). Large, open ducts minimize port turbulence and the heavily braced JBL enclosure assures tight, solid bass response. Designed to present a minimum frontal area, the subwoofer enclosure offers complete input connection flexibility with 2 Neutrik Speakon jacks. A recessed, external switch allows selection of either contacts +1/-1 or +2/-2 while an internal connector allows you to drive each woofer from a separate amplifier channel. The speaker cab is constructed of top-quality birch plywood and coated in rugged DuraFlex. Each woofer is housed in an isolated chamber and the enclosure is heavily braced to maximize low-frequency performance. The attractive CNC machined, 16-gauge steel grille is internally lined with acoustically transparent foam to provide the JBL SRX728S with additional driver protection and a very professional appearance. This subwoofer excels when paired with the PA speakers (sold separately).
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- Frequency Range (-10 dB): 27Hz 220Hz
- Frequency Response (±3 dB): 33Hz 220Hz
- Input Connection Modes: Switchable, +1/-1 or +2/-2; Internally selectable, Parallel or Discrete
- Recommended Crossover Frequencies: 80Hz, 24dB/octave HPF; 80Hz, 24dB/octave LPF
- Power Rating (Continuous/Program/Peak): Parallel: 1600W/3200W/6400W
- Maximum SPL: 136dB SPL peak
- Sensitivity (1w @ 1m): 98dB SPL
- LF Driver: 2 x JBL 2268H 18" Differential Drive woofer with neodymium-magnet and dual voice-coils
- Nominal Impedance: 4 ohms parallel; 8 ohms x 2 active discrete
- Enclosure: Rectangular, 18mm, 13-ply birch plywood
- Finish: Black DuraFlex finish
- Grille: Powder coated, black, 16-gauge perforated steel with acoustical transparent charcoal foam backing.
- Dimensions: 42"W x 23-3/4"H x 33"D
- Net Weight: 166-1/2 lbs.
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Standard Features
| Bi Amp or Full Range |
Other |
| Cabinet Dimensions in Inches |
23.7 x 42 x 33 |
| Casters |
No |
| Covering Type |
Spray Coating |
| Enclosure |
Ported |
| Enclosure Materials |
Plywood |
| Frequency Response |
27 - 220 Hz |
| Magnetic Shielding |
No |
| Power Rating Handling |
500 and up |
| Powered or Unpowered |
Unpowered |
| Sensitivity SPL@1W/1M dB |
90-99 |
| Speaker Configuration |
Other |
| Speaker Type |
Subwoofers |
| Stand Mount |
No |
| Weight lbs |
150 and up |
| Woofer Cone Material |
Paper |
| Woofer Size In |
18 |
| Woofer Voice Coil In |
3" dual coils |
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