12inch passive speaker box,GT-212 Economic carpet cabinet, with concise and compact appearance, excellency speaker can used in verious places, dancing hall,  and professional sound  projects. Double 12" bass: Stell basket,3.0" high-temp polyimide film voice coil,cloth edge and non-pressed paper+kevlar conepaper cone Single 1.75"drivee: titanium diaphragm, 1.75"(44.4mm)polyimide film voice coil,uses the Ferro-fluid cooledLow wastage,low-impesance inductance of design,use the PTCprotection of compression horn in the crosover.Horizontal,vertical,truss-mounted mounting design,we guaranteemany mode build in systerm. Voitage:110-230V,AC:60-50Hz,Rmspower:800watts,Impedance:8ohms,Sensitivity:103dB/m/w