This is great! And I'm happy to be helpful.
Funny thing is that I've been keeping my eye on CX-1's coming up on ebay just to get a feel for availability and going prices. The last couple of years one pops up every few months. Now that I bought one I see that in the last few weeks all of a sudden there is a
wave of them showing up, along with MX-1's. 5 in the last week alone. Strange.
Nonetheless, great that you also found one.
For me, one of the attractions of the CX-1 is the
lack of all of the A/V inputs and switching. I have a good Yamaha 7.1 A/V amp/system so all of that stuff is for my purposes just schnick-schnack that I don't need or want. Even not having a Loudness or Mono function is a plus for me.
There's something that you and 808_state can do that would be a large help to me. When you get your pre's you could open them up and check the values of C206 and C211 in the 0db-Amp. They should be the ones that I've crudely marked in the below photo.
View attachment 1023792
It would be helpful to see what the various production years have for caps here. The difference between the 2.2µF shown in both the schematic and parts list, and the 2.2µF/22µF that are in my unit is greatly puzzling to me. I'd like to see if other units are the same.
Cheers,
James