BOSS AUDIO SYSTEMS 12 in. 1000-Watt Car Subwoofers 1100-Watt Mono Amp R1100M Plus Amp Kit and 12 in. Enclosures 2 x CXX12 + R1100M + AKS8 + QTW12 - The Home Depot
JBL SRX918S 18" 1100 Watt Powered Subwoofer Class D Sub w/ DSP+Amp Rain Cover | Audio Savings
Amazon.com: JBL S2-1224 - 12” Subwoofer with enclosure and SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black (S2-1224SS) : Electronics