Hopefully the manufacturer has abused them horribly so they are confident they can cope. I've no real idea how manufacturers test this properly other than have a party and crank them up for hours.With that said, even if it's probably an excess of caution on my part, I think it would be prudent to make sure it doesn't overheat or do funny things with any content, especially non-musical content that contain a lot of high frequency (mostly thinking of some special effects in movies and video games).