So remember (and this is to me the only drawback) they are rear ported. So who cares? you do if you are playing on a stage with a heavy curtain behind you it totally changes the sound. Or if you are playing on such a large stage there is no real wall to bounce off of. I have run into this problem more than once. The amp really osunds great when in a perfect reflective spot, but if you life it and put it on a chair like other amps it losing bottom as there is no coupling effect.