Hi there - I have an AS50D acoustic amp, and whenever I turn the volume up past about 1/3, it consistently makes a loud "pop" sound when I strum. I have tried muliple instruments, multiple cables, and multiple rooms/power sources with the same result. I have also trued both channels and with/without a mic in channel two. All the same result. Presently I can't use it because of this. Please help, it's less than a year old!
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