Dustin, you shouldn't worry only about the amp shutting down, this is actually not the problem. What you should worry about is the amp clipping that can damage your tweeters. I remember when I first got the M80s, I turned the volume up to see how loud they could play and the amp started clipping around +5 or +7 (at least that I could hear). That will be source material dependent but whenever you turn the level above 0, you should really pay attention at the amp clipping. As JB said, if you do this on a regular basis, you should look at external amplification.
