As you can see from the above pictures, the measured results and then the correction added are just staggering. The major difference here is the subwoofer channel, look at the before and then the after results, let me tell you I am now getting a bass response that is unbelievably good to listen to, and a mid range from the system that just never existed previously. You know something is good when you break out the old test DVDs and CDs. http://www.avforums.com/forums/showthread.php?t=490969