RE AUDIO SEX12D4-v2 SEX V2 Series Die-Cast Subwoofer (12", Dual 4_) SEX12 V2 D4 - RE Audio 12" 650W RMS Dual 4-Ohm SE-X Series Subwoofer Thermal Power Handling: 650W Nominal Impedance: 4-Ohm Efficiency (SPL 1W/1m): 86.9dB Mounting Depth: 6.5"