18-inch Powered SubwooferThe 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. Features High-performance, high-density system solution in a truck-pack friendly format High-power-handling transducers deliver low distortion, high fidelity, and class-leading output Built-in, passively cooled Class D amplification with a universal power supply Dual Ethernet ports with Neutrik etherCON connectors Supports HARMAN HControl Ethernet User-controllable DSP LevelMax limiting uses sophisticated excursion-control algorithms to protect transducers Rear-panel LCD provides complete access to control features Reinforced 18mm plywood enclosures Specifications 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) Accessories (NOT INCLUDED) Highlights: Heavy-duty soft cover for SRX910LA enclosures Covers four SRX910LA on a Vertical Transporter Includes input panel flaps for testing purposes Handle cutouts for easy transportation Heavy-duty industrial-grade zippers Included: (1) Cover Highlights: Universal rain cover for SRX900 products Supports: SRX906LA, SRX910LA, SRX918S, SRX928S Flexible material for conforming to cables Covers LCD, audio, and data connections Unfolds for easy cable and LCD access Designed to remain attached Included: (1) Rain Cover (5) T15 M3.5 Screws Highlights: Universal caster kit for JBL products Compatible with SRX918S and SRX928S Black housing for discreet look Black polyurethane wheel Anti-rattle features for vibration-free operation Included: (4) Casters + Installation Hardware