The JBL STX828S passive subwoofer gives you high-performance, tour-quality sound in a road-ready format. All STX800 Series speakers give you exceptional durability thanks to multi-ply birch/plywood construction, complete with a Duraflex finish for additional protection. The STX828S handles an incredible 4,000 watts of power for rock-solid bass response in any application. No matter how you use it, you"ll love the big sound and reliable performance you get from the JBL STX828S passive subwoofer!JBL"s STX828S passive subwoofer packs dual 18" drivers with 4,000-watts RMS power handling for maximum sonic quality and amazing impact. JBL"s Super Vented Gap woofer technology helps extend the frequency response, so you"ll get ultra-low bass that retains punch and focus. The high power rating gives the STX828S the needed headroom to reproduce your sound with exceptional richness and focus, with virtually distortion even when pushed hard.