This question will really show my lack of understanding then. Would there be any difference or benefit to doing the following: Use the XPA-5 to run the tweeters and mids (2 channels) and use the XPA-2 to run the woofers (2 channels). Then use the other 3 channels on the XPA-5 to run the center and rears. This option vs. just using the XPA-2 to run the fronts (no biamp) and use 3 of the XPA-5 channels to run the center and rears.. I guess I have 3 questions...1. Which of these 2 options is the best, if either? 2. Would doing either of these options make any real difference vs. running all speakers off the XPA-5 as I am currently doing. 3. What difference is this supposed to make. Crisper, clearer, more power??