Product Name : JW1275009 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 : frame diameter : Diameter 315mm (12 in) Nominal impedance : 8 VOICE COIL DC resistance : 5.4 Nominal power handling : 320W Continuous power handling :320W Sensitivity (SPL1W/1m) :95 +/-2 dB Frequency range : F0~2.5 kHz Voice coil diameter :75mm (3 in) Winding material : COPPER Diaphragm material : PAPER Magnet material : Ferrite Special Features : Fms: 48.1Hz nref:2.70 % Res: 51.0 bl: 16.6N/A Re : 5.4 spl : 96.3dB Qms: 2.4 vas : 80.2L Qse:0.32 RP: 38.0 Qts: 0.28 LP: 63.7mH Rms:6.8kg/s cp : 235.1F Cms:0.20mm/N le : 0.77mH mms : 53.8gr sd : 530.9c? Minimum Order Size and Packgaing details : Packing:carton for trial order MOQ : 20pcs