I am experiencing a slight loss of sound and then a popping noise when using both my Line 6 POD HD500x and Kemper through the StageSource L3t. It seems to effect all inputs across the board. My only idea was it may have to do with the feedback suppression system, but I am not playing at an unreasonable volume or using any odd frequencies. Turning off the feedback suppression seems to reduce the issue slightly. The speaker itself is only a month a half old and has had this issue the entire time. Thanks for the help.