Alto Professional TS315S 15-inch Powered Subwoofer | Sweetwater
Alto TS315S - 2000-Watt 15" Powered Subwoofer @ The DJ Hookup
Amazon.com: Alto Professional TS315S | 2000 Watt 15 Inch Powered Portable PA Subwoofer With Selectable DSP Output Modes For Matching With Companion PA Speakers : Musical Instruments