ratpack: I don't have the technical expertise to answer your questions. But there was a difference. During my testing I made sure that the speaker settings (size, distance), the x-over points, sub settings, etc were all the same. I callibrated both units using Avia DVD and a rat-shack spl meter. I used the same source and cables with both pre/pros. I listened to music cd's and watched movies. In all cases, the Outlaw had more full, rich sound. It seemed to hit all freq. ranges more evenly. While the Rotel, it seemed, placed too much emphasis on the high end. Way too much IMO. In addition, the Rotel seemed to be lacking in the lower to mid range. I have no other way of quantifying this other than my ears. Sorry, I'm not that much of a techie. I know what I heard though....

later,
Simp