[fre11111]

Did you see the recent review by Danny on the discrete op amp by Sparkos?

Both my SACD player (Sony XA-5400ES) and Blu-ray player (Oppo UDP-203) have discrete op amps that could be upgraded with the Sparkos discrete op amp.  However, I opened both machines and failed to locate where they are.

I am in Northern California, are you able to work on my disc players and replace the op amp?

Yes, Hobbs is correct. In my experience not all uses a socket type application.