I was playing my Acoustisonic 100 tonight when I noticed the volume going on the main channel. I changed the battery on my guitar, but it didn't help. So I plugged into the mic channel and it was good. Plugged back into the main and still no volume. I turned the amp off then back on and it worked just fine. The amp is only 4 or 5 months old. Has anyone had a similar experience ?

Ok, this may be operator error. I used the feedback switch in advanced mode to learn the feedback frequencies. But, I did not reproduce the feedback within the 4 seconds. I left that on once it turned red. I tried it again tonight, and realized that I had a distinct reduction in the volume once the feedback eliminator was "trained". Although I still think that the channel volume continued to reduce on the first occaission.

So, it might just be some quirk in my using the feature. Is this possible?