This is a "very rare" product from Hughes Audio Products. Brand new and never used.
Before you turn away from a professional audio piece for in home 2-channel critical listening set up, let this engineer ramble a little bit. To my knowledge, SRS (Sound Retrieval System) started out as designed by Hughes, for the military to project sound to the enemy troops as to believe that tanks, troop movements were behind and to the side of their position ( psycho acoustics).
The SRS is not a simple effects box that is going to add sizzle and indiscriminate pizzazz to all your audio. Rather it is an accurate scientific instrument that is, in itself, extremely quiet.
Restoring valuable ambient sound information, having space control over the sound stage, to widen the center stage, makes for 3-D realism. When you can make the speakers vanish your in the Concert or movie.
Without re-tuning the room, twist some knobs and create a realistic soundstage.