Empirical Audio Parasound JC-1 vs stock

I have a set of Empirical Audio modded Parasound JC-1 amps. I wonder if anyone is willing to compare them with the stock amps. I live in Portland, Oregon.
I'm considering having Empirical Audio mod my JC-1s, have you found any further information on your question? There was one nice review posted on the forum.
what specifically is done to these amps for a mod.i am interested,as i own a pair.thanks in advance.
Machine, check the component mod section of www.empiricalaudio.com web page for brief description. If you have further questions you can ask Steve (Audioengr). I'm sure he would be more then happy to answer your questions.