Re: Ungrounded AC adaptor. The ac wall wart for the mixer is a special fit for Behringer only. The other end is a 2 prong where one prong is wider than the other.

Unless there is something I don't know about, like a special ac adaptor other than what i am aware of, then this won't happen.

I thought perphaps if I found an extension chord that was soft rubber perhaps I could shove the plug in backwards and reverse the polarity. The mixer manual say to not do what it is I understand we're attempting here.

I'm still listening. hmmmmmmmmmmm

Scott