Hello All, I recently purchased an Energy S10.3 to replace a stock sub that came with a surround package (Polk Audio RM6750) that have. The frequency responses for the satellite speakers and center channels are: 100Hz-24kHz. The frequency response for the old Polk Audio sub was 40Hz-200Hz. I originally had my old Polk Sub wired speaker level... in general, we were happy with the overall sound of our system. But, there were times where the sub would bottom out/distort. That wasn't good. So, I purchased this 10" Energy Sub. It's FR is 21Hz to 120kHz. It has a built-in crossover feature that allows you to set the crossover as high as 110kHz. I can't wire this sub speaker level... but I did purchase an LFE cable that I will be running out of my AVR. My plan is to set the crossover with the AVR... only, I'm not sure where to set the Frequency Response... and I'm beginning to wonder if this sub (based on the frequency response specs) is going to end up leaving a gap in some of the lower-mids. I say this because I have read that, typically, you set the FR to be 20Hz higher than the lowest out-put of your sats. But if I do that, that is the extreme high-end of the new Energy sub (where as the old polk sub went further into the mids at 200Hz). So, my questions are: (1) Where should I set the crossover on my AVR. (2) Do the specs say my new sub is a mis-match? (3) can you set a crossover for the outer limits of a speakers output (e.g., can I set a crossover at 120 if my sub only goes up to 120). (4) If I set my crossover lower (say, 110), what are the negatives and what should I listen for to know if something is wrong. Thanks much in advance for helping out a newbie!