Thanks. I suspect that the GRef is the one to audition in my system. I want to protect the very sonic qualities you mention...especially that, to me, essential quality of musicality which is made up many factors. Ironically, the Cardas people also suggest the GRef as a "very good" match (their words) to the Magnan I have between my amps and pre. Again, many thanks. This is the value of such a forum. Bert
