Spesikasi : nominal diameter 457mm/18in power rating 1200w nominal impedance 8 sensitivity 96db frequency range 45-2500hz chassis type cast aluminium magnet type ferrite magnet size 274×140×25mm magnet weight 5.53kg/195.3oz voice coil diameter 125mm/5in coil material sv-w number of layer 2(outside) former material glass fiber cone material paper surround material cloth spider single x-max 7mm/0.27in gap depth 12mm/0.45in voice coil winding width 26mm/1.1in net weight 15.34kg/pc packing dinension 480mm×480mm×235mm shipping weight 18.34kg/ctn 1pc/ctn