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JBL SRX728s Double Bass Speaker – 18-inch

Niclite Audio introduces the JBL SRX728S subwoofer at the lowest price in the country! 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).

JBL SRX728S Dual 18″ Passive Subwoofer

The SRX728S is built to deliver smooth, clean, accurate low-end. A pair of 18″ Differential Drive woofers provide extension down to 27 Hz while handling an amazing 1600 watts of continuous power. Large, open ducts minimize port turbulence and the heavily braced enclosure assures tight, solid bass. An external switch allows the SRX728S to be used with cabling systems designed to power subs from contacts ±1 or ±2.

KSh 99,999.00 KSh 105,000.00



  • Dual 18 in, 2268H Differential Drive® woofers for extended low frequency output.
  • Large vent area for reduced distortion.

The JBL SRX728S Dual 18″ Passive Subwoofer is a high power subwoofer system containing two 2268H neodymium magnet, patented* Differential Drive®, 18″ woofers in a front-loaded, vented enclosure. The enclosure is designed to present a minimum frontal area. The system offers complete input connection flexibility for compatibility with a variety of cabling schemes. A recessed, external switch allows selection of either contacts +1/-1 or +2/-2. By relocating an internal connector, it is also possible to drive each woofer discretely from a separate amplifier channel.

The enclosure is constructed of top quality birch plywood and coated in JBL’s rugged DuraFlex™ finish. 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 additional driver protection and give a very professional appearance.

JBL SRX728S Features:

  • High-power subwoofer
  • 2 – 2268H Differential Drive, neodymium magnet, 18″ woofers
  • Power Rating (Continuous/Program/Peak): 1600W/3200W/6400W
  • Front-loaded vented enclosure
  • 2 Neutrik Speakon NL-4 connectors
  • External switch selects either contacts +1/-1 or +2/-2
  • Internal connector separates each woofer into 2 channels
  • Birch plywood construction
  • Heavily braced
  • Rugged DuraFlex finish
  • Isolated chamber for each woofer
  • CNC machined, 16-gauge steel grille.

JBL SRX728S Specifications:

  • 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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