I have a pair of active spakers connected directly to the 2012 mini and sometimes i wil hear a constant static noise from them. It doesnt change if i change the volume. I didnt have this problem with my old 2009 mini. The sound stops when i unplug the speakers so its from the computer. Any ideas? I have 2 external drives plus a wlan model located pretty close to the computer - could that be the problem? cheers!