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Ground loop?

PostPosted: Thu Aug 14, 2008 2:31 am
by withneil
Hi there,

this is probably a ridiculously obvious one but I'm a bit dim so I'll ask just to be sure! :wink:

I get a serious buzzing sound when I plug a guitar into my DI box's high z input, and it goes away when I touch anything metal or pick the DI up off the floor, or if I plug into the ground lift input instead. Obviously this means the ground lift is working, but I just wanted to check that I'm not ignoring some problem by doing this. The SCA chassis is sitting on a power amp unfortunately due to space restrictions, but even moving it several feet away made no difference.

Thanks!

PostPosted: Fri Aug 15, 2008 7:58 am
by tpryan
Is the DI line powered? If so, try plugging it into the same outlet as the preamp.

PostPosted: Fri Aug 15, 2008 8:22 am
by withneil
No it's just a cheap little passive DI box. I guess I'm OK to just use the Ground Lift input then?