(2) RE Audio SXX12D4 V2 12" Dual 4-Ohm Car Subwoofers Totaling 2400 Watt RMS With Redesigned Look and Improved Efficiency RE Audio SXX12D4 V2 12" 1200W RMS Dual 4-Ohm Car Subwoofer SXXV2 Sub SXX V2 12D4. Power Handling: 1200 Watts RMS Dual Composite 2-piece Cone. Rubatek Foam Surround, Cast Aluminum Basket. Tork-Tite Terminal, 3 4-layer Aluminum Voice Coil FEA-optimized Motor Structure. Triple-stack Magnets, Progressive Spiders. Wrap-around Rubber Gasket Impedance: Dual 4 Ohm. Top-mount depth: 7", Diameter: 12.5" Enclosure Recommendations. Ported (Compact), liters/cubic ft: 1.5/42.48, Ported (Optimal), liters/cubic ft: 2/56.63