Apologies if this is a major dummy issue, but my speakers (Klipsch Heresy III) are putting out a low level buzz when connected to my UFO2, even when the UFO2 is not connected to power or any other sources. Playing around a bit, I've found that if I have a connection between the speaker terminals or speaker wire and the input jack, such as my finger or a piece of wire, the buzz goes away... I'm assuming this is because I'm eliminating the ground loop. I can't figure out why the connection from the UFO2 to my speakers is creating a buzz unless grounded to the input jack. I subbed in my 2011 SE84C+/CKC and didn't have this issue. Any idea what would be causing the buzz on my UFO2?

Thanks so much for your help!