You'll need a pretty strong PA system, for one. You'll need monitors too;

I had a dream that I was in a five-piece band that had all of their equipment hooked up direct; It went like this,

Drummer= Electronic Drums
Bassist= PreAmp inside guitar-> Direct
Rhythm Guitarist-> PreAmp -> Direct
Lead Guitarist-> PreAmp-> Direct
Keyboardist-> Direct

imagine the stage volume if you did this, with In-Ear Monitering!

~Incidents