I have mostly been playing my effx directly into my computer. Tonight I was playing into an amp and didn't bother using my stereo to mono adapter. The G1X Four apparently has only a stereo output. So I was running the output thru a mono cable to a single input on my amp. I noticed that periodically, the volume would drop about half for a minute or less and then come back up. I hooked up my stereo to mono adapter and it didn't do it. Is there some kind of sweep or protective circuit that lowers the volume if the output gets overloaded or is not a stereo cable out? Has anybody else run into this?