... Ohm Impedance2" KAPTON Voice coil50 OZ Ferrite Magnet300 Watts RMS,600 Watts Max.PowerCone Material: PaperEdge Material: Cloth12" Aluminium ... " Black AluminiumSV Voice coil65 OZ Ferrite Magnet400 Watts RMS,800 Watts Max.PowerCone Material: PaperEdge Material: Cloth15" ... " Black AluminiumSV Voice coil100 OZ Ferrite Magnet900 Watts RMS,1800 Watts Max.PowerCone Material: PaperEdge Material: Cloth 10 ...