DIY surround sound four channel headphone mod. Geeky? Sure. Hard to do? Probably. Effective? Apparently. Complete with mixing box.
In effect, you get a very real theater sound (Better sound then most theaters) It feels like your [sic] on the set, and you can hear many details that you never hear in the theatre…It’s fun to turn down the front speakers and just listen to the rears, there is often sounds from the crew or director that the mixer’s didn’t catch.