RM1250 ground loop noise

[Disciple]

Curious if anyone can chime in why the RM1250's are having ground loop noise? Usually you see this when running two amps stereo or when running two RM4's with an RT250, but why does rm1250 have it running by itself? And of course there's no ground lift button on the rear to fix it.

 

[gweb]

No noise issues with mine. It's very quiet. The only time I notice any hum is if I don't have a module screwed in. If I just push it into place and don't secure it with the side screws it doesn't always make perfect contact and there is some hum. Other than that, no noise.