I've used a G10 for years with no problems at all. I thought I was upgrading to the G10S and liked the idea of the 9v power supply. I've had all kinds of interference issues with the G10S. I'm going to try the USB power next gig and see if that helps. And bring my G10 as a backup! I am very disappointed with the G10S. I may return it and stick with the G10 if this continues to be an issue.