JBL Professional JBL SRX818S Passive 18-inch subwoofer

The SRX818S is a single 18-inch passive subwoofer for touring and installed rigs. A JBL 2279H woofer in an 18 mm DuraFlex-coated plywood cabinet is rated 600 W continuous into 8 ohms, reaching 28 Hz at -10 dB with a fixed 80 Hz crossover point. The indexing feet let cabinets stack in either the standard or the cardioid position.

A standard M20 pole cup on top takes a full-range box, four handles are moulded in, and the enclosure accepts the JBL WK-4S caster kit. Connection is NL4 in and NL4 loop-through with selectable +/-1 or +/-2 pins. An external amplifier is required.

Type	Passive 18-inch subwoofer
Nominal impedance	8 ohms
System power rating	600 W continuous / 1200 W program / 2400 W peak
Maximum SPL	123 dB continuous, 129 dB peak
Sensitivity	95 dB
Frequency range (-10 dB)	28 Hz - 150 Hz
Frequency response (-3 dB)	45 Hz - 150 Hz
LF driver	JBL 2279H 18-inch
Crossover frequency	80 Hz
Inputs	NL4 input and NL4 loop-through, +/-1 or +/-2 selectable
Enclosure	18 mm DuraFlex-coated plywood, Obsidian finish; accepts JBL WK-4S caster kit
Mounting	M20 threaded pole mount; indexing feet for standard or cardioid stacking
Dimensions (H x W x D)	683 x 684 x 575 mm (26.89 x 26.92 x 22.62 in)
Net weight	35.4 kg (78 lb)