With the Harmony remotes, you don't need to enter codes. You set up the remote on the Harmony website and it downloads the codes to the remote via USB. You can check the Harmony website to see if the MF player and amp are in their database.
I haven't used one in 7-8 years, but when I used one in the past it worked great.
I haven't used one in 7-8 years, but when I used one in the past it worked great.