LD Systems MAUI 5 Channel PA System, Black Ultra portable (25lbs) column PA system Integrated 4 channel mixer plus Bluetooth connectivity for mobile devices Single 8" sub/four 3" mid-high range drivers Class D amp with 800W Peak output Max SPL 120dB/frequency response 50 - 20000Hz.Woofer magnet:Ferrite This is an aftermarket of generic part