The Smyth Realizer is a system designed to produce full surround sound through headphones. It has been shown at previous shows over the past four years or so, but has only recently become available at $3360, which includes a pair of entry-level Stax phones. To explain, how it works would be far beyond the space limits of a blog, but we hope to have a closer listen at one very soon. All I will say here is that it does work, and the result is an uncanny simulation of a full surround system with loudspeakers.