Amazon.com: JBL Club WS1000 10" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
2X JBL Stage 810 800W Max Power 8" Stage Series Single 4 ohm LOUD Car Subwoofer | eBay
4X JBL Stage 810 800W Max Power 8" Stage Series Single 4 ohm LOUD Car Subwoofer | eBay