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
Ported Sub Box Enclosure for 2 12" Rockford Fosgate P3 P3D2-12 P3D4-12 Subs | eBay
Gately Audio - 4 X 12” SUBWOOFER ENCLOSURE SUBS UP/PORT BACK 7.0CF - Limitless Lithium
Visonik V123BP Bandpass enclosure with dual 12" subwoofers at Crutchfield
Amazon.com: Custom Ported/Vented Sub Box Subwoofer Enclosure for 2 12" Rockford Fosgate T2 T2D412 Subs - 36 Hz : Electronics
Amazon.com: Pyramid 12" 1200W Car Audio Subwoofer - 2 Way Neon Bandpass Speaker System w/ Blue Lights, DC 12V Input/4 Ohm/32Hz-1KHz Freq.Res w/ Plexi-Glass Front Window & Silver Polypropylene Cone - BNPS122 :
12" Bandpass Sub Box / 12" Dual Ported Subwoofer Enclosure Vented Sub Box 2 12" | eBay
BLACK 12" DUAL COMPETITION PORTED SUB BOX
Custom 4th Order Bandpass Subwoofer Box Plans | CustomLowz