The easiest way to connect up the B205D to a larger PA system for monitoring is to connect in a feed from the AUX send off of the larger PA system to either the MAIN IN on the back of the B205D or to one of the MIC/ LINE inputs on the front of the B205D. This means that all signal sent to your B205D would be controlled by the person running the larger PA system. This is the most common way that monitoring systems are set up for most live performances when a larger PA system is used.