JBL GT5-2402BR Ported enclosure with two 12" GT5 subwoofers at Crutchfield
JBL GT5-1202BR Ported enclosure with one 12" GT5 subwoofer at Crutchfield
GT5-12 12" Woofer – Technical Data - JBL.com
DUAL JBL GT5-12 SUBWOOFER IN 36HZ TUNED LPORTED BOX (SLOT PORT ENCLOSURE) - YouTube
JBL GT5 - 30cm 12" 1100 W max. - Audiopipe
In the making, 4th order bandpass to house a JBL GT5-12. Removable/Interchangeable... - Fat Sound Customs - Specialist Custom Built Bass Box Subwoofer Enclosures | Facebook