It drove a pair of Totem Fire monitors, drove them very well I might add. Very smooth, very "musical" sounding amp.
The guy I sold the MAC6700 let me know that he was driving a set of Legacy Audio floor standing speakers. He is "tickled pink" with the McIntosh as well.
My only suggestion is to make sure you have picked out the spot it's going to live in, as with lots of McIntosh equipment, that baby is HEAVY!