I have a Pioneer vsxd912. Previously I owned a Sony STRDB930 and it would play all bass through the sub (Or to my novice ear appeared to) I like the 912 but the only time I can "Feel" the sub throwing out bass is on 5.1 DVd's. My Sony activated the sub for everything DVD's CD's and Sky+ non 5.1 channels. What setting am I missing? It is my only disapointment with this great reciever.