I have used this amp, and/or the 7 Pro quite a few times on my concerts, (either one was on my standard rider) but on more than a few shows, the amp (take your pick) would suddenly go quiet. Even in a non-cased amp in an air-conditioned environment. I thought at first it was thermal shutdown, but in some cases only 5 minutes after beginning to play, no sound. Power still on, but no sound. Not a good thing to happen during a concert. Luckily I usually have a spare, (brand not mentioned) which I really don't care much for, but it gets me through the night. As much as I LOVE THE SOUND, I just can't trust them on a big, or important stage. When it's good, it's excellent, but when it's bad, it's all the way bad!