i just got two KRK Rokit 5 studio monitors. i am running them through my PreSonus Inspire 1394 firewire interface to my MacBook 1.83GHz. i am not sure whether i changed some setting before my problem, but i hear a slight buzz all the time while listening. by slight i mean very slight. i figure it must be either my Inspire 1394 or my firewire port, but i'm not great at this sort of thing. i'm running them low-volume, two feet away from each other on a desktop. are there any things i can test on my mac to solve this, or is it definitely a hardware issue? right now i am going to try to run them both on different outlets, but i doubt that is the problem. update: there is also a semi-rhythmic pop accompanying the buzz. but it seems to go away for hours at a time, but here it is again as we speak. i'm not impressed.