Bill Dennis
New member
I'm interested to know what is causing this too. Having similar issues with a different manufacturer's power supply was really frustrating.
Proximity effect interference is one thing but what you are describing sounds like a grounding problem to me. Bottom line is that it shouldn't happen with any isolated power supply.
Mine was nerve wracking since my modulation pedals were audible when they were bypassed. The noise changed if I turned the rate controls on any pedal with an LFO. No such issues with the 1-Spot or the Voodoo Lab Pedal Power 3+.
Yes but of the ground the units are connected to is problematic all bets are off. The one spot doesn't have the 3rd prong, maybe that's the difference? Try a ground lift on the the ISO5's. I used an ISO5 for years with no issues before upgrading to the PP2+ for more capacity. I used/use a splitter in about every port of both of them and don;t have any noise issues.
The other thing to try is using the daisy chain cable from the 1 spot into one 9v port of the ISO and see what happens. Try each 9v port one at a time. Not the 18v though lest you smoke some pedals....