I don't think that there's any benefit, as far as the universal player, for having both 5.1 and 2.0 outputs connected. I would suspect that this is true for the Audio Refinement.
Have you tried just disconnecting the 2.0 connection and see how it sounds for 2 channel audio listning. What I'm not sure about is if you'll be able to select the subwoofer on or off.
Have you tried just disconnecting the 2.0 connection and see how it sounds for 2 channel audio listning. What I'm not sure about is if you'll be able to select the subwoofer on or off.