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
BLACK 12" DUAL SLOT PORTED BANDPASS SUB BOX
Custom 4th Order Bandpass Subwoofer Box Plans | CustomLowz