Sorry, its just that I want to be careful, my laptop cost me $1500 when I bought it new 2 years ago. Also, a bunch of guys at MacRumors.com told me that it was still a bad idea. I trust you guys way more though, since they seem to know NOTHING about electronics. Thanks for being patient with me. The power supply is 9volts on the one I'm using. Now, I know you already said that I shouldn't worry, but to be even safer, if I ran it off lets say, 4.5volts that would be the highest it could possibly get right? The lm386 chip can be supplied on as low as 4 volts, and I have another amp that I built running on 4.5volts and works fine (I don't have it anymore). Would that be better?