I remember that little Radio Shack phono amp from the seventies. They sold it as a magnetic-to-ceramic level converter, in that it was intended for use as a way to facilitate an upgrade from ceramic cartridges to magnetics. If I remember correctly, those units did not include built-in RIAA equalization because of this. Ceramic phono inputs have RIAA EQ already, so the converter wouldn't need to provide the curve.I'm surprised that Radio Shack still sells those converters. Do they now have an RIAA filter, maybe with a selector switch underneath or something? Does the article mention anything about this?