Mega power in a small package

Have you guys seen those sony vios with the tiny power amp in the back for poweringthose two small speakers? I think it would be neat to do the same to my case (which is big enough to fit several in there). I mean, think about it, if you went to a lan all you would have to do is bring some speakers and 2 lenght of speaker wire and then just run from your box. Not to mention you would be the envy of your fellow lanners!
One feasable method I have worked out would be to get a small car amp like 200 watts peak by 2 channels (which is basically what a deck puts out) and run draw power from a burly psu (like a 650 watt unit). I have a small amp that doesnt work, but the power and signal input is just like like the auxiliary on the psu. You see, i am trying to create the pretty much self contained "does it all" Laning machine. If you could throw and amp in it you would be allset! So what are your opinions on this?

If an orange was driving a racecar would it peel out?