You can never under power a speaker and blow it from underpowering it alone. If you set your gains, EQ's, etc. right and listen to it at the proper level its impossible to damage a speaker from underpowering. Its a fact of all speaker designs. Clipping is caused by more than just user error. It can be inherent in the music (thanks to todays crappy artists), improper gain settings, improper EQ settings, bass boost just to name a few.