The SRX918SF is a powered, flyable single 18-inch subwoofer designed to be deployed in suspended or ground-stacked configurations to complement SRX900 Series full-range systems. The integrated three-point rigging system in the SRX918SF allows units to be suspended in standalone arrays or in combination with SRX910LA cabinets in mixed-array configurations.
The subwoofer houses a JBL 2279-1 18-inch woofer featuring Differential Drive® - JBL's dual voice coil, dual gap technology - to deliver better heat dissipation, lower power compression, and wider dynamic range than conventional single-coil designs. Built-in DSP and amplification offer a plug-and-play experience while providing consistency and optimum performance anywhere in the world.
The SRX918SF incorporates a large low-frequency port design that improves airflow and reduces audible turbulence, even at high output levels. A reinforced 18 mm birch plywood cabinet ensures enhanced strength and durability. A full-featured software package gives users complete control of the system on various platforms, including Windows, macOS, and iPad OS.
- High-performance, high-density system solution in a truck-pack friendly format
- High-power-handling transducers deliver low distortion and class-leading output
- Built-in, passively-cooled Class D amplification with a universal power supply
- Dual Ethernet ports with Neutrik etherCON connectors
- Complete control and configuration with JBL Performance software over HARMAN's HControl protocol
- User-controllable DSP
- LevelMax limiting uses sophisticated excursion-control algorithms to protect transducers
- Rear-panel LCD provides access to control features
- Reinforced birch plywood enclosures
- M20 threaded mount for pole mounting or ground stacking full range components
- Integrated three-point rigging system

What’s in the Box?
- Frequency Range (-10dB)35 Hz -100 Hz
- Coverage PatternOmnidirectional or Cardioid
- Maximum SPL134 dB
- System TypeActive Subwoofer
- Amplifier DesignClass-D
- Continuous Power Rating1,100 Watts
- LF Driver(1) JBL 2279G-1, 18 in diameter, 4 ohms, dual 3.0 in diameter voice coil, ferrite Differential Drive®
- EnclosureExterior grade birch plywood, Black DuraFlex finish
- Dimensions (H x W x D)575 mm x 710 mm x 683 mm
- (22.6 in x 28.0 in x 26.9 in)
- Net Weight (each)54.4 kg (120 lbs)