The GTO series provides incredibly deep bass response thanks to the strong yet lightweight polypropylene cone and distortion absorbing rubber surround. $299.99. Free shipping. Car Subwoofers. JBL GT-BASSPRO12 450 Watts Max 12" Car Audio Ported Powered Subwoofer Enclosure. Free shipping. Excellent sound quality and impressive power handling will have you enjoying the best car audio possible. The GTO series subwoofers… Only 1 left! Car Electronics Best Sellers New Arrivals Car Stereos Car Video Speakers Subwoofers Amplifiers Radar Detectors GPS Store Resource Center All Electronics 1-24 of 38 results for JBL JBL GT-BassPro12 12-Inch (300mm) Car Audio Powered Subwoofer … (24) 24 product ratings - 2x JBL CS1214 12" 2000W Car Subwoofers Power Subs Audio Woofers 4 Ohm SVC Black. 62 watching. Take the party on the road with top-rated JBL car speakers. Whether its a polypropylene woofer cone to ensure maximum efficiency and performance or a progressive spider cone to provide exceptional control and reduce distortion at the highest output levels, JBL subwoofers … $119.99. Pair (2) JBL GTO1204D subwoofer … The JBL car subwoofers separate themselves from the pack by providing the quality and reliability you've come to expect from JBL.