... 12inch RMS300W/Max.600W Car Subwoofer Dual 4 Ohm impedance Products Image: Specifications: 1),12inch ... perimeter vents 3),NRPP cone with rubber surround 4), Bowl type consturction wove dustcap 5),Double ... diensty efficiency magnet 6), 2" Hi-temp 4-layer aluminum coil 7), Black mixture fabric spider ... gasket 11), Chromed plated push terminals 12), Dual 4 Ohm impedance 13), 300W RMS / 600W Max.PowerT/S ...