Back in '86, AVA released their Transcendance CD player. It used a Magnavox CD player (CDB-460, I think) that they installed new circuit boards and then had a separate chassis that had the final filter/amplifier circuits installed. Seems that this item is the second chassis. Probably not much good unless you can find the other Magnavox chassis with the other circuit boards installed. Any of AVAs subsequent stand alone DACs (TOPP-DAC, Omega, Insight, etc.) would probably out perform the original that this filter chassis was paired with.