Ported enclosure for single 12" Audiopipe TXX-BD4-12 - Subwoofers / Enclosures - Steve Meade Designs - #1 Car Audio Enthusiast Forum in the world! - Meade916 - SMD
AudioPipe TXX-BDC4-12 12 Inch 2,200 Watt Dual 4 Ohm Car Speaker Subwoofer, Black - Newegg.com
TWO AUDIOPIPE TXX-BDC4-12 12" DUAL 4-OHM CAR SUBWOOFER – DiscountCentralOnline
AUDIOPIPE Dual 4 Ohm 12 in. 2,200 Watt Car Speaker Subwoofer, Black TXX-BDC4 -12 - The Home Depot