Audio Jam Inc. - Some car audio fans love the clarity of sealed subwoofer enclosures. Others crave the added power of vented enclosures. The GT-12BP bandpass subwoofer offers both. It delivers accurate
JBL GT-12BP GT Series 12 Inch Loaded Bandpass Subwoofer Enclosure - Open Box - Creative Audio
JBL Grand Touring Series GTO1204BP Bandpass enclosure with 12" subwoofer at Crutchfield
JBL BAND PASS SUBWOOFER - D Cars AuDio Bass & Tuning | Facebook
Mono subwoofer Amplifier with Passive 12" GT Series Loaded Ported Bandpass Subwoofer Enclosure and 8 Gauge Wiring Kit - Walmart.com