Use the A/B test in the player to switch between 3D Sound, where the sound will be externalized -- outside your head, and traditional stereo, where the sound will be between the speakers -- inside your head.
These demos are designed to sound best with the Sennheiser HD650 headphones. The more closely your headphones match the Sennheiser HD650, the better the effect. An affordable match is the Sennheiser HD598.
You should get a good match with any headphones that are:
-Open back. The back of the ear cups are open and the sound leaks out into the room.
-Over ear. Your ear fits complete inside the ear cup aka full size headphone or circumaural headphones, as opposed to headphones that sit on your ear.
These things will improve your demo and product experience:
-Matching your hardware. We can provide an audition with demos precisely matched to your hardware.
-Head tracking. The realism becomes magical when we hold the sound stage still while you move your head.