First off, I'm still waiting on my system to arrive. It should be this week though. Anyways after doing a bunch of searching and reading, I'm now more confused than I was before. (If that's possible) What I do understand is any frequency above my crossover point will go to the selected speaker. Any frequency below is diverted to the sub. That's about all I know. Here's a list of my speakers. 4 JBL ND310II's Left/Right and Surrounds Frequency Response= 37Hz - 20kHz Crossover Frequency= 1000, 5000Hz JBL EC35 Center Channel Frequency Response= 75Hz - 20kHz Crossover Frequency= 800Hz, 3200Hz JBL PB12 Sub My receiver is a H/K 7200 which has triple crossovers (L/R, CC, & surrounds) which come from the factory set at 100Hz. Now ideally I would like to use my big 310's for bass as well as my sub. So what should I do? I know the typical response is to set them at 75-80Hz. But that means that my 310's won't be using even close to their potential. And should I use the same crossover setting for all speakers? Just asking because I couldn't find much info on the best crossover point for the center channel Thanks for any help.