Nano Cortex ground issue

[Desertdweller]

When I plug my NC direct to my computer, or with headphones, there’s no problem.

When I plug it through a power amp into a cabinet, I hear a distinct ground loop noise. It’s not terrible, but it’s there. I can tell it’s a grounding issue because if I put my finger on the NC, the noise goes away as it’s grounding through me.

I have it hooked up on a pedalboard using a TrueTone One Spot CS6 and it takes up 2 500ma plugs on the CS6. It’s the only pedal drawing power from the CS6 right now. The power amp doesn’t have noise if I use it by itself, the NC doesn’t have noise if I use it through a PC or headphones, but the NC and the power amp connected to a cabinet creates a grounding issue for the NC where it’s ungrounded. This does not happen with my FM9, but it has a grounded IEC plug.

Any ideas how I can fix this?

 

[Progressive_disclosure]

I’ve had my Nano for a few weeks but haven’t played it through a power amp and cab yet. I’ll try to replicate this tomorrow if no one else has any good answers before then, and see if it’s the same for me!