Mcintosh C2200

Yes, spoke with Chuck at Mcintosh. He confirmed only the first 50 or so units Mcintosh made were affected.

Folks: I checked with Mac just minutes ago. The only software changes were to fix a problem with the input trim. On some early production units, the gain would only go up, rather than up or down as it should. There have been no changes that would affect the sound of this excellent pre-amp.

The C2200 is microprocessor controlled. One of the features this allows is the ability to trim each input up or down by 6 dB. Due to and error in programing the micro some C2200s were shipped where the trim could only be adjusted down. If you have a C2200 that does not allow the trim to be set at a + value the preamp should have the micro changed. This is of course a warranty repair so contact your dealer or McIntosh service.
Ron-C

I decided to call McIntosh and spoke with Ron. He nows nothing about any software upgrade for the C2200
Dave

I also would like to know.
Dave

Ask Mcintosh. I'm curious too.