On 13.06.16 09:34 , yahoo@... 1 wrote:
> The hum is probably caused by a ground loop. Due to safety reasons all metal parts of the A-100 cases are connected GND AND to earth
> shield of the mains connector.

Scott wrote
"No the rails are not connected to ground. This is the way Doepfer built
the box and I was not advised to change it."

These are LC9 cases. Are those cable in a different way


Florian