I get little "static" noises from time to time, but it happens on more than a single pair of headphones, so I'm pretty sure it's internal sound card/external wiring related.
Nope it's the Quality test, the "Bass Shaker" one. It would only make the buzz at 100% full volume (it occurred at the start and the end of the test). I know the a900x aren't bass heavy headphones but I assumed good headphones aren't supposed to buzz at all, even at full volume.
WHOA! My ear drums feel like they were vibratin'! Both sound equal, no buzz, crazy...
Edit: I paid $240 after tax from Best Buy cause I'm impatient and impulsive. :D
Edited by Jodiuh - 4/13/13 at 7:02pm