What is Invisible Stereo?
In straight terms, the use of a Audio Transducer, a 2.2 lb. magnet, equipped with a 1″ edgewound aluminum voice coil, that when properly installed onto the backside of a sheetrock or paneled wall or ceiling, creates accurate reproduction of sound frequencies by turning up to a 8 foot diameter of the exterior surface of that location into a full range, 20-20,000 Hz resonating speaker surface!