I purchase a 555es yesterday, and is not at all disappointed. Quality of music is clearly better. My question is when I play 2ch cd/sacd through the player 2ch output, there's plenty of bass going to my sub. When I play music through the 5.1ch output, there's very little bass going to the sub eventhough I set all speakers to (small+sub) in the players bass management? Thank You in Advance.