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Home Forums Products Stompboxes H9 Daisy Chain Power Rail Hum Reply To: H9 Daisy Chain Power Rail Hum

Eventide Staff

It does sound as though you have some kind of ground loop, but without seeing your setup it is hard to be sure.

There is a tiny tiny chance that a hardware fault in the H9 is creating your hum, but you say that "the issue does not occur when I use a separate supply for the H9" – this means that the H9 is not at fault.

The above confirms to me that you have a ground loop, probably through your common power supply. You should either remove any superfluous grounds, or if you cannot, run the H9 on its own separate power supply.