Grounding cable gauge size

bugredmachine

The Andrews should have a filter network in it like the Groundmaster to make sure what goes in does not came back through.

What makes you think it's just an empty box with a simple wire in it?

It would never be an empty box. It would have to have filters for certain frequencies and perhaps some diodes to let the noise escape and not return.

I never said the Andrews was an empty box. 

I found  plugging in the ground wire from grounding box to a power conditioner is better.

I would like to try the Andrews plug, but since I got hum when I tried a ground wire from an AC outlet to my grounding box, I'm not sure if the Andrews device would change that.

I am in the USA, and it would be a long return process.

ozzy

Ozzy, have you determined what kind of ground is going to the box? Are you connecting in series or parallel?

If your box is a chassis ground or otherwise an electrical ground then you would be creating a loop no matter what the device is.

If your signal ground is not part of the AC ground of the device then you will be okay. Have you checked all your ground points to the AC ground pin on the IEC of your devices first to determine which is truly a signal and which are AC grounds?

To repeat, on my amp, the ground of the iec on the amp is exactly the exterior of the XLR connectors and the chassis itself. So therefore, they are AC grounds and already being dumped through your power cable. If you try and "ground" them once again via a box, that is okay. If you then tie the box banana to an outlet ground, that is creating a buzz because it is a ground loop.