I recently sent my original crossover network for my Usher cp-6311's to Danny for an upgrade. Upon arriving I couldn't wait to reinstall these monsters, I also installed the No-Rez dampening material, after 200 hrs of burn in I can honestly say that these speakers have reached a new plateau ! I won't go into all the audiophilia lingo, all of the elements that make up a world class speaker are present and this is coming from a person with many years of recording studio experience. For those of you who doubt that this type of upgrade can make such a huge difference I only have one thing to say, You are out of your mind ! these paired with odyssey kismet mono blocks make for a match made in heaven ! Thanks Rob