JBL BassPro 12 Ported powered subwoofer with 12" sub and 150-watt amp | Competition Sound
Amazon.com: JBL Club 1224 - 12” Subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics
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