Page 1 of 1

Gain control noise

Posted: Tue Dec 06, 2016 5:19 pm
by Joslenior

anybody experienced this: on a R8 with the inputs enabled turning the gain knobs generates a sizzling sound as if there is dust in the potmeters. After a while this lessens and almost disappears. When the unit is power cycled the sounds are back. Talking about a brand new unit.

Thanks for replying,


Re: Gain control noise

Posted: Tue Dec 06, 2016 9:01 pm
by Jim_Fogle
Does it make a difference which altorhythm is selected? Many of them change the preamp gain and that can affect how clearly you can hear control changes.

Re: Gain control noise

Posted: Wed Dec 07, 2016 5:28 pm
by Joslenior
No, it's not depending on algorithm. I found some old posts describing this behavior and there is a statement from Zoom that this is caused by a design glitch whereby phantom power is effecting the op amps. I think I can live with it.

Thanks for replying.