Hello. I have had my Firebox for awhile now and I finally solved one of my humming problems with my speakers. I was running both S/PDIF from the Firebox and System outs to my monitors and it would start humming really bad when I turned them up loud. Well, I fixed that by unplugging the system out to my monitors, no hum. So now Logic and iTunes both have sound, but nothing else. Now, I still don't know my Mac entirely, I'm still learning, so any help on figuring out why this isnt working would be splendid. Thanks!!!