Hello all- This site has been the best resource in building what now has become nothing short of an addiction. To think... 2 years ago I would have given anything for a Bose, and now I curse them for their hype and overpricing. I have read a little about tweaking a system so that it sounds better. I'm not really sure how to do this or if it is worth the time. I think there was a cd called avia?? And somehow this would help to increase the wuality of sound. Here is my current setup... Denon 1803 receiver 4 S38's for the fronts and surrounds PB12 for the subwoofer S-Center II and monster cable all around. I have the worst DVD player known to mankind (a Lasonic...YUCK!) or a PS2 don't know which one to use while I save up for a better one. I do not have a back channel yet (6th channel maybe an S-center II) I guess what I am looking for is an excuse to dink around with my toys without having to move the speakers too much. I know very little about crossovers and cutoffs (maybe a better way to say this is I do not know where to cutoff my s38's/pb12 so that the low frequency is picked up by the sub.) So in a nutshell... can someone tell me if there are any inexpensive tweaks that I can make to my system and how loud can a person turn up these speakers with this receiver? I realize that all of this really depends on the listener and the ability to see the current setup (I may give a link later) but any thoughts/feedback or suggestions would be valuable... Thanks!!!