"It would be easier to speculate if you mentioned what was going into each channel. Mics? Pre's? Can you be specific about all the inputs and settings? Thanks!"
Thank you for your interest.
My basic m.o. is 2 aud mics, 2 stage mics, all with phantom power, mic-in, low, channels 1-4. And soundboard line-in channels 5&6.
I had issues with my board feeds for the past several shows, but as I said above, only thought to check the cables at home.
Here's the details from my last outing:
Channels 1-6 six were armed. I had stage mics going into 1&2; mic-in, low gain, phantom on.
At the last show I had my audience mics (ca14 > ca9200 > 1/8” x dual xlr) going line-in to channels 3&4, set to line in on top of the deck.
I had a stereo soundboard feed (dual rca x xlr adapters) line-in channels 5&6. I was only showing a signal on channel 6, (since it was a mono board feed, I was able to come away with a satisfactory recording when I mixed this with my stage mics – mic-in channels 1&2.
I recreated the entire chain on a second 680 at home and everything was fine; I feel I have narrowed the issue down to the original deck.
To be specific to what I did at home: I tested mic-in on both units with condensor mics on all six channels; no issues. The above results as far as line-in were from inputing music (DR-2d line out > 1/8" x xlr > 680).