Ill give a $5 dollar reward (to your paypal) to best answer... PA system question? for like the 5th time?

the PA amp comes with speakers, so why buy more? using a 400 watt speaker on an amp that only chugs out 70 watts does not make sense. the mixer on the PA amp only accepts 3 mic inputs, not 4. the 4th input is for your external stereo music source and the 5th channel is for the built-in internal MP3 player. the input on the mic channels needs to be switchable, the output from the wireless receiver is usually line level and not mic level. the external music source can be a CD player or anything with RCA line level output.