Imagine being surrounded by every note, noise and nuance of your favorite album, movie and game. That's exactly what the AstoundSound Expander 3.0 does – it takes the sound coming from just two speakers and turns it into a spherical, 4D listening experience that's so real, it's just like being there.

AstoundSound™ uses 4D sound technology software built on over a decade of research and development into how the human brain perceives sound. In a similar way to what Hi-definition did for visual experiences, 4D audio immerses listeners in a 360-degree, realistic sound experience that addresses azimuth, elevation, distance and movement over time. In other words, a 4D listening experience creates the sense of movement in a 3D listening environment. Read more.