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Grounding issues with SV-1?
Posted: Wed Apr 25, 2012 2:30 pm
by KorgSauceJaunt
Hey guys, first post here. I've been experiencing some grounding issues I think with my SV-1 through my amp recently. It's producing a low hum that only occurs with my SV-1 and not any other keyboards I own. I was wondering if anyone has experienced this problem and if they know how to go about fixing it. Maybe try just running it through DI? Any help is much appreciated. Thanks
Posted: Wed Apr 25, 2012 2:48 pm
by Rodney
I get some hum when running my SV1 through a Bose L1 system, but it's at a low enough volume that I don't let it bother me -- the piano sound is much louder. My Kawai doesn't do this, so perhaps this is the one advantage to having a wall wart instead of an internal power supply... this happens even when I plug both into the same power strip, so I don't know what else can be done. Also, try turning off and on the amp simulation. Some of the hum might be coming from there, in which case I'd just consider it part of the "vintage" ambience....
Posted: Wed Apr 25, 2012 2:58 pm
by flyingace
I had this issue. Do you have the USB cord plugged into your computer at the same time? I did and when I unplugged it, the hum was gone completely!
Posted: Wed Apr 25, 2012 3:55 pm
by KorgSauceJaunt
flyingace wrote:I had this issue. Do you have the USB cord plugged into your computer at the same time? I did and when I unplugged it, the hum was gone completely!
I have no USB cord plugged in at all. Just a normal quater inch. At low volumes it's not noticeable, but with my band, it becomes unbearable.
Posted: Wed Apr 25, 2012 4:42 pm
by scales
Have you tried an AC ground adapter?
Posted: Wed Apr 25, 2012 6:51 pm
by KorgSauceJaunt
scales wrote:Have you tried an AC ground adapter?
no, what exactly does that do?
Posted: Thu Apr 26, 2012 2:18 pm
by oy5t3h
Is your amp connected to the same power socket as the SV-1?
Try a DI box with a ground lift switch.
If that fixes it, then it was a ground loop, and it's sorted.
If that doesn't fix it, then it could be a problem with the board. May need to take it back to the store.
Posted: Thu Apr 26, 2012 3:50 pm
by KorgSauceJaunt
oy5t3h wrote:Is your amp connected to the same power socket as the SV-1?
Try a DI box with a ground lift switch.
If that fixes it, then it was a ground loop, and it's sorted.
If that doesn't fix it, then it could be a problem with the board. May need to take it back to the store.
turns out I had a DI box lying around and the ground lift switch did the trick. thanks guys