Hifonics Zxt 15D2 Zeus Extreme Subwoofer 38 CM (15 ") 7000 Watt Zeus Zxt Extreme | eBay
12" Subwoofer Soundstream X5.12 7000 Watts for Sale in Palmdale, CA - OfferUp
2 x Warzone 15 Inch 7000 Watt Car Audio Subwoofer w/ 2 Ohm DVC Power (2 15 SUB ) | eBay
Amazon.com: Audiotek AT7000M 1 Channel Monoblock Class D Car Amplifier - 7000 Watts, 1 Ohm Stable, LED Indicator, Bass Knob Included, Mosfet Power Supply, Great for Subwoofers : Electronics