I agree with everything mentioned above. One thing that I would add that I believe is a very important part to a good country-style tone; A decent Tele or Strat style guitar (important) with a good compressor pedal (more important). It makes a difference. My 2 cents...
I experienced this same issue with my Triaxis. First it was intermittent volume drops on both channels. Then I lost the A channel altogether. I had one tech look at it who was sure it had something to do with the IC's but never could quite nail it down. I finally got it back from him after a 5...