I just can't get over this amp,today was the first day I have got to push this amp a little and test it's boundries,then I find out it has none,I had the lead pulled out,master on close to 3 set for metal with the processor at dark hall,and my OD pedal runnin' 1/2 and got nothing but brutal razor like pristine metal shakin' the windows heaven!!Then I brought it to about 3 1/2 and hell opened up and caused a bonafide 80's rock concert!! I have been baptized in the blessed ways of the MESA!!!