#1
i noticed that my dunlop rotovibe seems to make a hissing noise through the amp when i hook it up. even if its off. i also noticed this goes away once i hook up the 9V adaptor to it. when i take it out so it uses battery power, it hisses and seems to sound thinner than with the adaptor.

does anyone know of how i can fix this? this would be kind of a problem when doing a show or jamming because i dont want this loud hissing noise.
#2
maybe the adapter you are using it with is not suitable e.g not by the right manufacturer, wrong Current Rating or something.
'08 Gretsch White Falcon
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#3
Check your cables going into and coming out of the Rotovibe. It sounds like you have a ground problem, and using an external power supply is providing the missing ground. This would also explain why it sounds thinner on the battery.
#4
Quote by druz15_UG
maybe the adapter you are using it with is not suitable e.g not by the right manufacturer, wrong Current Rating or something.


He said it goes away with the adapter, and returns with a battery.


What surgeon said, check your cables.
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