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 Stadium 1224 Stadium Series 12" subwoofer with switchable 2- or 4-ohm impedance - Breakers Stereo and Performance