Thought I might aswell post this here as it was worth a sticky at the old place :eek: Here's a photographic walkthrough of my installation of a Trichord Digital Output Board to my ageing Marantz CD50SE player: [URL]http://www.zerogain.com/hifi/dob_install.html[/URL] Might be useful if you are thinking of doing a clock upgrade yourself and are not sure what's involved. Michael.