Sound test?

[Epical]

It's kind of hard to explain, but basically I'm looking for a file (.mp3, or whatever) that plays a long string of sound that tests the clarity/power of a sound system. If not a long string of sound, but something like the THX intro that you see in all the movies. It doesn't have to be a sound demo, but even a trance (again, whatever) song that has these different pitches and bass-rumbles in it. Also, some sort of trailer (we've been using the Halo 3/Splinter Cell: Chaos Theory trailers, but they're starting to lack =\) that has a pretty good sound track to it... it can be music (Halo 3), or just random noises (Splinter Cell) that sound good when played on the right system.

If you're wondering why, I work at an eletronics store, and I would like to take this sound file on a flash drive there and put it on the PC all our computer speakers are hooked up to.

Thankie.

[Tyche]

I have a CD that plays the highest possible pitch to test tweeters the gradually builds to the lowest bass to test subs. Its in my car somewhere, and by somewhere, i mean i dont really know.

[Epical]

Well I don't want to make people's ears bleed... I still want something that's pleasant/exciting to listen to. =(

[Killgannon]

Try some postrock ala Sigur Ros, Godspeed You Black Emperor, Explosions in the Sky uses all kind of various instruments at different tempos and stuff. It's really good music, might not be EXACTLY what you're looking for but it's what i thought of... also classical (Beethoven type stuff maybe?)