JBL SRX918S Single 18" Powered Subwoofer


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The SRX900 Series embodies the advanced performance principles that drive JBL's development of audio products that make a real difference in the world of professional audio. This next-generation family of powered line arrays and subwoofers addresses the growing need for scalable small and medium-format professional sound-reinforcement solutions for rental companies, fixed installations and musicians seeking the ultimate combination of performance and portability.

The SRX918S is a single 18-inch active subwoofer designed to complement SRX900 Series full-range sound reinforcement systems. 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 SRX918S incorporates a large low frequency port design that improves airflow and reduces audible turbulence, even at high output levels. A new, full-featured software package gives users control of the system on various platforms, including Windows, macOS, and iPad OS.


JBL transducer technology delivers class-leading low frequency performance and superior dynamic range.


Form cardioid arrays simply by orienting the cabinets and select- ing a preset.


Onboard Class-D amplification and DSP provide optimum perfor- mance and consistency across the world.


The SRX900 Series is a complete solution featuring full-range products, subwoofers, accessories, and software.


The 2279-1 18-inch woofer delivers transparent, linear bass re- sponse down to 35 Hz. This driver uses dual three-inch voice coils and leverages JBL’s patented Differential Drive technology to deliver maximum sensitivity and power handling in a light, compact design.


SRX900 Series subwoofers are acoustically compatible with all SRX900 full-range speakers and support 60 Hz and 80 Hz operat- ing modes. SRX900 line arrays can be ground stacked with SRX900 subwoofers using the optional base plate accessories.


SRX900 subwoofers can be used in omnidirectional or cardioid configurations simply by selecting the appropriate speaker preset and cabinet orientation. The preset can be accessed directly from the rear panel LCD or via software.


Frequency Range (-10dB) 35 Hz-90 Hz (Preset: 80 Hz)
Coverage Pattern Omnidirectional or Cardioid
Maximum SPL 134 dB (Preset: 80 Hz)
System Type Active Subwoofer
Amplifier Design Class-D
Continous Power Rating 1,100 Watts
LF Driver (1) JBL 2279G-1, 18 in diameter, 4 ohms, dual 3.0 in diameter voice coil, ferrite Differential Drive®
Enclosure 18 mm plywood, Black DuraFlex finish, two integral recessed handles
Dimensions (H x W x D) 575 mm x 684 mm x 683 mm
(22.6 in x 26.9 in x 26.9 in)
Net Weight (each) 44.5 kg (98 lbs)