JBL 12" WOOFER SVC 1000 WATT(STAGE 1210) AND COMMON CRATE BLUEPRINT – BassCrate Enclosures
Amazon.com: JBL Club WS1200 12" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
JBL Stage 122D Stage Series 12" component subwoofer with dual 4-ohm voice coils at Crutchfield