I am very new to these posts. I have an Adcom 535 II amp and a Adcom 400 tuner/preamp. The question I have is the Adcom today the same Adcom in the early 1990's when I bought the above mentioned equipment? It seems like many people are unhappy with their quality control and customer svc. Also has anyone had experience with the Adcom GTP 602 tuner/preamp? Is so, what is your opinion on it?