Massive Audio Hippoxl122 4000 Watt 12 Inch 2 Ohm Hippo Series Car Subwoofer Sub for sale online | eBay
QPF15DSUPER-2 (Pack of 2) Q Power 15 Inch 4000 Watt Super Deluxe Subwoofer DVC Car Audio Sub | QP15-Super
Pair of SoundXtreme 12 Inch Car Audio Subwoofer with DVC Power (2 Sub) 4000 Watt - Shopping.com
NeweggBusiness - Car Subwoofer by HippoXL122 - SPL Extreme Bass Woofer - 12 Inch Car Audio 4,000 Watt HippoXL Series Competition Subwoofer, Dual 2 Ohm, 3 Inch Voice Coil. Sold Individually