I have a DV-46AV and in the players menu, you can set the default format to play (SACD 2 ch/SACD Multi/CD) I can't remember exactly what the options are but they are there-Of course the menu is only available via video-not on the display ont eh player-I really wish they had a button on the front for that. I want to use this as 2 channel source, I don't want it hooked up to video. I don't know about the DV-48AV though