Amazon.com: Custom Ported/Vented Sub Box Subwoofer Enclosure for 2 12" Rockford Fosgate T2 T2D412 Subs - 36 Hz : Electronics
12 in. 1200-Watt Bandpass Box Subs (2-Pack) and 1500-Watt Mono Amplifier and Wire Kit 2 x BNPS122 + AC15001M + AKS8 - The Home Depot
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
NAKAMICHI DUAL 12" SUBWOOFER ENCLOSURE WITH TWO 600 WATT RMS 12" SUBWO – G2 Dynamics, LLC
Custom 4th Order Bandpass Subwoofer Box Plans | CustomLowz
2 Memphis Mojo6 12" Sub and Port Back Subwoofer Box Plans | CustomLowz
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