The big advantage of the XA30.5 is the SuSy [super-symetry]circuitry that Nelson patented. Here is the url:
http://www.passlabs.com/pdfs/articles/susy.pdf
I don't know if the XA30.5 will drive all the speakers to volume levels acceptable to you.
http://www.passlabs.com/pdfs/articles/susy.pdf
I don't know if the XA30.5 will drive all the speakers to volume levels acceptable to you.