JBL Professional JBL SRX818SP Powered 18-inch subwoofer

The SRX818SP is the self-powered single 18-inch subwoofer in the SRX800 line. A Differential Drive 18-inch woofer on 1,000 W peak of Crown amplification reaches 29 Hz at -10 dB and makes 135 dB at one metre.

Amplification is Crown DriveCore Class D and the DSP is fully user-configurable: 20 parametric EQ filters, speaker delay and 50 preset slots, set from the rear LCD or over network control. The back panel is printed in glow-in-the-dark ink for dark stages. Input is a Neutrik combo jack with two XLR outputs for looping. The cabinet is 18 mm DuraFlex-coated plywood, takes the JBL WK-4S caster kit, and carries an M20 threaded pole mount for a top box. It weighs 87 lb.

Type	Powered 18-inch subwoofer
Amplifier design	Class D, 1000 W peak
Maximum SPL (1 m)	135 dB
Frequency range (-10 dB)	29 Hz - 150 Hz
Frequency response (-3 dB)	35 Hz - 120 Hz
LF driver	1 x 18-inch Differential Drive
DSP	20 parametric EQ filters, speaker delay, 50 preset slots
Inputs / outputs	Neutrik quarter-inch / XLR combo input; 2 x XLR output
Enclosure	18 mm DuraFlex-coated plywood; accepts JBL WK-4S caster kit
Mounting	M20 threaded pole mount
Dimensions (H x W x D)	683 x 684 x 575 mm (26.89 x 26.92 x 22.62 in)
Net weight (each)	39.5 kg (87 lb)