Yeah. I've established that the tweeter makes this noise at 1100-1800hz f.e, haven't tried finding other area's. The thing starts resonating and creating a ruckus. If i switch balance to the other unit, the noise is gone and i only get a tone. Also tried different audio devices. 'tis very unfortunate.
However, this gives me the oppertunity to swap them for black ones. So it's not all bad.
- - - Updated - - -
Oh my god, i'm in love with noctua already. For the first time no rotary or bearing noises.
Once the Dark Rock 2 finaly arrives, i'll make some better pictures.