The QSA118S is a compact, high power, flyable subwoofer system using a custom 18”woofer in Bass-Reflex configuration. The woofer handles a 1400 watt furnishing a SPL of 132 dB. Built using a 13-layer birch plywood and extra textures scratch resistant enclosure (18mm / 0.71”) with integrated handles and mechanical hardware for suspension.1 x 18”(4”VC) B&C®custom woofer granting high excursion and power handling.Extended frequency response to 35Hz. QSA118S can be suspended or ground-stacked, 35 mm pole-mount socked. Four optional castors facilitate quicker and easier load ins and load outs.