The literature says they are not. My exp says they are not. How it comes to your system that it seems they are is a mystery to me... though I will still suspect the recording... past that I have no thoughts which might help.
other Thor owners might chime in here and be of further aid to you... or you can seek them out yourself elsewhere on audiogone.
other Thor owners might chime in here and be of further aid to you... or you can seek them out yourself elsewhere on audiogone.