Is there a way to ground the 0v rail between two 7U cases? Has anyone else had noise issues patching between two stacked 7U cases?
I’m getting a soft hiss from any jack on my upper rack. I don’t even need to plug in the jack. Just touching the patch cable’s tip to the outside of the jack will output a soft hissing sound.
I’m sending audio out of my Intellijel 1U stereo output, which is in the lower case. If I touch the patch cable to any jack on the upper case I get a soft hiss. Jacks on the lower case are dead silent. The problem is clearly in patching between the cases. But both cases are plugged into the same Tripp-Lite surge protector with the same ground. In fact all my studio gear (including the mixing board, etc.) are all on the same ground.
I’m using proper TRS cables for output, which I’m taking from the lower case’s TRS jacks.
There doesn’t seem to be much variation in the hiss no matter what I’m modulating. It’s not like noise I’ve experience before where a certain module seemed to be causing noise on the power supply.