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
JBL GT5-12D | Sub Woofer Speakers | Croooober
Brand new - JBL GT5-12 12" Single 4 ohm GT Series 1100W Car Subwoofer