I originally posted about this in the tube section, and it was suggested I post here since there could be more information to be had. This link is for that post. http://audiokarma.org/forums/index.php?threads/marantz-8b-find.745595/ I have only read about this amplifier and do not have any real knowledge about them other than they are considered highly desirable. I was hoping to find a replacement parts list in the manual I downloaded but it wasn't included. Feeling pretty lucky to own this beauty, hoping to get a nice 7C preamp someday to pair it with.