JBL GT Series Basspro12' Subwoofer Boxed for Sale in Queen Creek, AZ - OfferUp
JBL GT-BASSPRO12 for Sale in Oakland, CA - OfferUp
Old School JBL Power GT Series GT152D 15" Subwoofer 300W UNTESTED | eBay
Amazon.com: JBL GT-BassPro12 12-Inch (300mm) Car Audio Powered Subwoofer System, black : Electronics
Amazon.com: JBL GTO Series Premium 6 x 8 Inches Co-Axial Speakers Pair with Patented Plus One Woofer Cone, Silk Dome Tweeters - Set of 2 Bundled with Earbuds : Electronics