I have a athearn sd 45 with the plug and play on it i have a dh123 on it but i want to put a sfx oo4 soundbug on it also for sound on it has anyone that with the
A better choice wound be to replace the light board with a DH165AT, then just plug in the sound bug. Even better than that would be to purchase a QSI-R or a Soundtraxx Tsuanami TSU-AT1000 645.
David B