I am pretty new to this so I'll start off with my setup. Denon AVR-1603 Front: Polk RTi38 Center: Polk CSi30 Rear: Polk RTi28 Sub: PSW303 I have the sub hooked up to the unfiltered in. Speakers set to small except for the fronts. Sub cut off frequency is at 80 on the reciiever. I have absolutely no idea how to get the sub in sync with the other speakers! There is so many options... You can turn up the decibles for the speakers and sub. Best to be all the same or at 0? What about the dials on the back of the sub? Where should I put those at? And what does the 0 and 180 switch do? I have been fidling with everything and I can't get it to work right. The bass is either great on movies or non existent on music. Also on movies the center channel is hard to hear? Should I turn it up more or would that ruin the imaging?