Use the A/B test in the player to switch between 3D Sound, where the speakers will appear to melt away and the sound will come from multiple locations on a virtual sound stage all around you, and traditional stereo, where the sound will be at or between the speakers.
These demos are designed to sound best with the Apple MacBook Air 13s. The more closely your speakers match those MBA13s, the better the effect.
You should get a good match with any speaker system that is:
At eye level and +/- 30 degrees on the horizontal. The closer to this angle the better.
Uncluttered. The more the direct path from the speakers to the ears dominates the reflections (the sound bouncing off nearby walls or clutter) the better this demo (and everything else) will sound.