My Infinity RABOS kit arrived today, and since I had the house to myself, I did some measurements. Results below. The kit consists of a sound level meter and a CD with lots of test tones. It only covers the bass range from 20 to 100 hz. There are noise tracks that you are supposed to use to balance the subwoofer with the system. There are also several sheets to graph the results, I promptly scanned one into the computer so that I can save the originals. These kits are available to anyone who wants one, here
This accesory is not intended to be used with a system like mine, I'm not even using a subwoofer right now. And I can tell that if I try to correct the response to be flatter in the center of the room, (where I measured) I'm just going to create problems elsewhere in the room. But it's been fun and interesting, and maybe I can use this to improve my speaker positioning and listening chair position. I'll fool with it more over the next few months. If I manage to make any improvements, I'll post another chart later.