Possible faulty channel

Can anyone offer any help before I contact A&H?

QU16 used last night for an open mic night and i had mics in channel 1&2. The mic in channel 2 was loud and clear but channel 1 was quiter and sounded slightly muffled and not as clear. Both mics and cables are the same makes but I swapped them over between channels and no difference, so not a mic/cable fault. No gates or compressors active and peq settings were copied from one to the other so both of them the same.

Is there anything else I could be missing?

I’d try a hard reset, but it rather sounds like there is either a setting you missed - or that the preamp/ADC in one channel is on the way out.

A reset will make sure that there are no missed settings…

Are you using the local inputs mic->lead->desk, or a D Snake?

Things to check that are not so obvious to see, are the DCAs, though they shouldn’t make anything muffled.

Cheers guys, I’m using local inputs so no D Snake to worry about. A hard reset has reduced the problem but not cured it totally although it is now at a point where I wouldn’t really have noticed it to start with.