I have this thread going already but realize that I mis-titled it...I've got a 600w 4ohm 4x10. The impedance limits me, I realize, but it was a great price on a new cab. SO: how can I maximize my headroom without running too many watts? I recently played a Carvin bx500 through a Carvin 4ohm 4x10 and the low notes on my 5-string were distorting. So what the heck do I do? I'm looking at a little mark 3, hoping that will be muscular enough to keep the low notes clear... Thank you!