So I am sitting here watching tv and it hits me... What would happen if I plugged the sub's RCA directly into the DVD player, completely bypassing the Denon. Holy Cow Batman, we have bass when listening to DVD audio in 5.1. I have the M&K 5000 and normally have it set to THX mode. I am still playing with it but the output on the DVD player is most definitely outputing bass when listening to DVD audio. I just did this 5 minutes ago so I am not sure about what is happening or how to make it sound better. Still need to play with crossover of the sub to get it to blend better. The only 2 DVD audio disc's I have are Metallica and STP which aren't the best discs for testing bass. Thought some of you guys would want to try this and post your results/thoughts.