Amazon.com: Dual Electronics BP1204 High Performance 12 inch Car Audio Subwoofers in a Tuned Bandpass Enclosure with Blue illumiNITE LED Illumination and Plexiglass Viewing Windows and 1,100 Watts of Peak Power : Electronics
Source JLD audio new design 10 inch vented passive 250w bandpass subwoofer box for cars on m.alibaba.com
Q-Logic QB-112.3 Single 12" bandpass subwoofer box at Crutchfield
D4S SUBWOOFER BOX
Q-Logic QB-212.4 Dual 12" bandpass subwoofer box at Crutchfield
Team D4S PROFAB Dual 10" Ported Subwoofer Box - Down4sound
BLACK 12" SINGLE COMPETITION PORTED SUB BOX
Source Custom Built Subwoofer Enclosures Bandpass Subwoofer box Small Bass Box for Car 10inch/12inch on m.alibaba.com
Pyle Plqb10 10 Inch 500 Watt Max Power Vehicle Car Audio Speaker Subwoofer Bandpass Enclosure Box System With Plexiglass Front Window Panel (2 Pack) : Target