purchase of public address system to schools , portable public address system model active speaker system bi-amp power output - (rms / peak) watts 200 or higher amplifier type class d dsp frequency response 40hz-20khz ±3db max spl 121db lf driver size 1 x 8 woofer with 2 voice coil hf driver size 1 exit with 1.35” voice coil input connector 1 x stereo rca,1 x jack (line) and 1 x switchable xlr-jack (mic/line) output connector balanced xlr (m) additional features usb/sd mp3 player and bluetooth. power source ac (240v-50hz) warranty1 year or above including dual channel uhf/vhf wireless microphone system with two handheld mirophones, two microphones can be used at same time. (as per nit)