Product Name : JW1275019 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 : 400W Sensitivity (SPL1W/1m) : 97+/-2 dB Frequency range : F0~3 kHz Voice coil diameter : 75mm (3 in) Winding material : COPPER Diaphragm material : PAPER Magnet material : Ferrite Special Features : Fms: 49.7Hz nref :1.62% Res: 58.0 bl: 17.7N/A Re : 5.4 spl: 94.1dB Qms : 11.48 vas: 55.4L Qse:0.41 RP: 51.4 Qts: 0.39 LP : 44.9mH Rms : 2.1kg/s cp : 318.9 F Cms:0.14mm/N le : 0.79mH mms :75.3gr sd : 530.9c? Minimum Order Size and Packgaing details : Packing : carton; for trial order MOQ : 20pcs