JBL Professional JBL SRX928S Powered dual 18-inch subwoofer

The SRX928S puts two JBL 2279H-1 18-inch Differential Drive woofers in one horizontal cabinet, driven by 1,100 W continuous of Class D power. It reaches 31 Hz and makes 140 dB, and runs in omnidirectional or cardioid presets depending on how much energy you want behind the array.

Amplification is built in, Class D and passively cooled, on a universal power supply. Two Neutrik etherCON ports carry HARMAN HControl for setup and monitoring, DSP is user-controllable from the rear-panel LCD, and LevelMax limiting uses excursion-control algorithms rather than a simple thermal limiter to keep the transducers inside their range. The enclosure is 18 mm plywood in black DuraFlex with four recessed handles; at 47.4 inches wide and 155 lb it is a two-person lift or a cart item.