This is all quite odd... Let's see if we can track down some possible solutions. I doubt that there's a compatibility issue between the two units, since we're talking about nothing more than an analog input.

First, if you switch to the 6ch input and get only left and right channels, make sure you are switching to that input from a multichannel input. If you switch to it from an input configured to play back in stereo, the 6ch input only enables the left and right channels -- it's a known bug. Switch through an input using some surround processing (any surround processing), and you'll get all six channels.

If you are switching to the 6ch input from another input that is in surround mode, and you still get no sound or only stereo sound, it is time to (1) check all interconnects to be sure none are loose and (2) dig into the Denon's setup menu. I know some SACD players have to be told whether to play back in multichannel mode or in stereo mode, since the SACD format was originally stereo only, and the default for the 2200 might be stereo. There is a note on page 14 of the 2200's manual that says "Set the “SUPER AUDIO CD” setting under “AUDIO SETUP” to “MULTI”." -- I'd check to see that "Super Audio CD" in Audio Setup is set to Multichannel and not stereo or CD (if it was set to CD, a non-hybrid SACD might cause tjandriesen's problems). I'd also make sure "Audio Channels" was set to "multichannel" as well.

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