 Unfortunately, delays and problems kept the Tate DES IC's from the market until the late 1970s and only two consumer decoders were ever made that employed them; the Audionics Space & Image Composer and the Fosgate Tate II 101A.The Fosgate used a faster, updated version of the IC, called the Tate II, and additional circuitry that provided for separation enhancement around the full 360° soundfield, using the Haas effect.In order to maintain the highest quality levels, Fosgate used hand-sorted ICs and 1% -tolerance components, and each decoder was hand-optimized.