JBL VTX S28 Full Size, Suspendable, Cardioid-Arrayable, Dual 18″ Subwoofer with Ultra Long Excursion Transducers. This subwoofer’s two 2269H 18″ transducers feature Differential Drive technology with two voice coils, two neodymium magnets and extremely high peak-to-peak excursion capabilities, delivering extended very- low frequency performance.

It can be suspended or ground-stacked and is cardioid-arrayable in either configuration for improved rear rejection. Compatible with JBL’s VTX V25 line array speaker suspension, S28 can be suspended at the top of V25 arrays to extend the effective low frequency line length, providing improved vertical pattern control combined with improved rear rejection when used in cardioid mode.

It is also an ideal companion to the Crown VRack amplifier system.

Components: 2 x 2269H Differential Drive® 18″
Frequency Range (-10 dB): 24 – 400 Hz
Frequency Response (+/-3 dB): 27 – 300 Hz
Sensitivity (1W/1m): 96 dB
Nominal Section Impedances: 2 x 8 ohms
Continuous Power Rating: 4000W
Dimensions: 48″W x 19.42″H x 36.68″D (1219.2 x 493.3 x 931.7 mm)