I have been having an intermittent issue with my Acoustic Image Ten2. On some nights the notes will get distorted and the sound will lose its clarity and the volume decreases. This problem will happen and then it will go away. Other times it won't go away. Other nights I don't have any issues at all. It works perfectly every time I try to diagnose what is wrong with it, and then I go to a gig and I have the issue. Has anybody else had this happen? Any ideas?