Oddly enough, I cannot find any information regarding what type of terminals the Monitor Audio GX series have, and if they will accept the locking bananas and/or spades, and if so, what size? I have been communicating with BJC, and they cannot guarantee that the speakers will accept their locking bananas, and if the surrounds will accept spades or not. BJC mentioned that in order for their spades to fit, the terminals need to be 1/4" diameter or less.