Used my bi amped rig for the first time last night, it was at an open gig so a number of bassist got to use it. Everyone commented on the tone and balance of the sound, down side is the set up time and sheer bulk. I have read a number of forums where players have tried such a rig and found it lacking, for a varying reasons. Funny thing was watching another player, i leaned against a wall and the rig was vibrating the wall. Its not a large set up just very efficient, unfortunately age is against me so lugging it around is not practical.