Someone said hearing the differences are like spotting the ding in a car door. You may need certain light to see it, but once you do you cant unsee it....

It is at this point I would suggest you go rent a pro amp. Long and mcquade rents yorkville ap4k amps. Try one...... be careful.

Its not a hifi amp, but varying the gain vs preamp level in will show you how an amps soundstage can change when even compared with itself. They arent the same at all.

Plus it is literally a bottomless pit of power. The only reason I didnt buy one is the low level hiss when no signal is input. In my quiet room it bugged me. A great amp for subs though..... like 2 custom 15s..... Mwa ha ha.