just got a sansamp gt-2 and it sounds great. I really like the guitar sound going through a power amp. but the sound is quite boxy. I assume this is due to the cab sim. can it be turned off, or the pedal dialed in, so that the effect isn't so big? anyone of you using it in an poweramp in live situations? what are your settings? if I run it through my esi speakers with the box sim, it sucks pretty much! any ideas?