DY-1010 2 X10"Subwoofer Box Durable Black Carpet 2"(BASV)Voice Coil 40 oz Magnet Impedance:4 Ohm Stereo MAX Power:550 Watts DY-1012 2X12"Subwoofer Box Durable Black Carpet 2"(BASV)Voice Coil 50 oz Magnet Impedance:4 Ohm Stereo MAX Power:650 Watts We have many models of car speaker component kits;profession speaker component kits; Loudspeaker Components and GPS , with high end good quality and best prices . If you are interested in our products ,please feel free to contact us . OEM/ODM service :available