Club 1224 | 10" (250mm) and 12" (300mm) car audio subwoofers
JBL Arena 10 Arena Series 10" component subwoofer with 2- or 4-ohm selectable impedance at Crutchfield
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