JBL MS-BASSPRO SQ 10" powered subwoofer at Crutchfield
New JBL® Aftermarket Subwoofers Offer Deep Accurate Bass for Drivers | HARMAN
2x JBL GT5-10D 10" Dual Voil Coil 4-Ohms CAR AUDIO 275 Watts Sub Woofers 1 Pair | eBay
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