JBL SR4718X Single 18" 1600W Program 3200W Peak Passive Subwoofer Un-Powered Sub | eBay
JBL 428F Professional High-Power Dual 18" 1600W Passive 4281F
JBL Power P1020D 10" Dual 2-ohm Component Subwoofer at Crutchfield
JBL Power Series P1024 at Onlinecarstereo.com
JBL PRX418S 1600W 18" Passive Subwoofer
JBL Club A600 High Performance Compact Class D Car Audio Mono Subwoofer Amplifier Bundle with 8" 1600W Max Power High-Performance Car Audio Subwoofer and Amplifier Wiring Kit - Road Entertainment
JBL Club A1000 1000W Subwoofer Amplifier with 2x 8" 1600W Peak Subs & Wiring Kit | eBay
JBL Arena X | 800W RMS 12" 2-Ohms Component Car Subwoofer
JBL PRX418S 1600W 18 inch Passive Subwoofer | Sweetwater
JBL Professional EON718S 18" Powered PA Subwoofer | IDJNOW
JBL Power P1220D 12" Dual 2-ohm Component Subwoofer at Crutchfield