Product Name : JOW127503 Product Description : Professional Audio Speaker ; Usage For Woofer Price of product ( USD price or FOB price) : 1USD - 88USD Product origin : Guangzhou P.R China Key Specifications/Special Features : Frame Diameter : Diameter 315 mm (12 in) Nominal impedance : 8 VOICE COIL DC resistance : 7.2 Nominal power handling :300W Continuous power handling : 300 W Sensitivity (SPL1W/1m) : 99.5+/-2 dB Frequency range : F0~3 kHz Voice coil diameter : 75 mm (2.5 in) Winding material : Aluminium Diaphragm material : PAPER Magnet material :Ferrite Special Features : Fms: 52.9Hz nref : 2.65 % Res: 38.0 bl: 21.6N/A Re : 12.3 spl: 96.2dB Qms: 12.82 vas: 76.0L Qse:0.41 RP: 246.6 Qts: 0.40 LP: 95.5mH Rms:1.2 kg/s cp: 134.8 F Cms : 0.19mm/N le: 1.34mH mms:46.9gr sd:530.9c? Minimum Order Size and Packgaing details :