I'm looking for a mate to a single I already have. Acrosound Stereo 20 OR a Stereo 20A. The Stereo 20 (pictured) has a PT, whereas the 20A only has an OPT and takes it's power from the Stereo 20 via an umbilical cord. I'm looking for EITHER in operable condition. That means good OPTs. Cosmetics not so important.