I have the behringer 2030a just got secondhand a few months ago, I think you replies to a thread of mine on Here Ryszard, not too sure if I remember correctly but I have a vague recollection that you said that you had cables in an unbalanced configuration, maybe I remember wrong and it was somebody else.
Anyways I had the same type of hum on speakers, didn't get or felt it wouldn't help to get balanced cables from interface to monitors.
Tested an old cable that I had lying around and hey presto it seemed to cure it, so got the balanced cables on ebay for £15.
I would say hum and noise is gone now even when I turn speakers to full volume, maybe a little background static, which is probably normal enough.
Balanced cables seem to have solved my problem. Hope you can cure yours as easily.
Musiclover
Last edited by musiclover; 09/16/14 04:18 AM.