Modified? Great, one can spend more $$ have it modified, but no one to repair it when it breaks down. I have owned this complete CAL 2500 system no fewer than three times, and especially when run as a system, it is nothing less than spectacular. That being said, I was lucky enough to never have any problems with any of the pieces I owned, but those that have, are stuck.
I don't think I would ever spend money making modifications to a unit that isn't repairable any longer, or, although someone could work on it, parts are not readily available. Scott Morris used to help out with work, but as I understand it now, no longer around to do so.
btw - 500 x 5 (real power, no Sony/Kenwood, etc) power was more than enough to drive difficult loads like the Wilson V5.1 and Aerial 10Ts to extreme levels without issue. Again, smoking great amp, and the SSP? Just as good with some of the best capabilities of any processor I have ever had. It allows one to set CD1 running speakers crossed at 60 with the subs kicking in AND CD2 with speakers set to FULL, no SUB!
I wish other manufacturers would have made what seems to be a simple concept available on their processors.