Tremor 18 - 18" Powered Pro Audio Subwoofer Cabinet (Pair)These amazing Powered 18 inch Pro Audio Subwoofer Cabinets deliver the low end sounds loud and clear with a 18 inch woofer and 500 watts RMS. It doesn't matter if you are doing a DJ gig, a wedding, a church event, or a club gig, these subwoofers will deliver the deep bottom end you want! Great quality powered subs are very hard to find, especially at a decent price. The Seismic Audio brand was designed to make the professional musician, as well as the