[zenstone]

Hi,

I have another solution to this very irritating problem of the high pitch whining sound in the mbox 2 mini.
Try plugging the power of your monitor speakers into another outlet (grounded or not grounded) then the rest of your gear.
This way you separate the ground from your setup from your speaker monitors. Because the problem really is in the ground somewhere!
It is not the best solution, but it works! It did for me.

Thing I also tried and didn't try:
-Tried different usb cables: did not work.
-Tried different outlets (grounden/not grounden) for the whole setup: did not work.
-Did not try the balanced cables, because I think that wont work, because the mBox 2 mini doesn't have balanced outputs.
-I also tried the mbox on a different computer: did not work.
-I even tried it in at a different location (same setup though): did not work.

I hope this will help all of you who had the same (very irritating) problem I had. Let me know if it also worked for you.

Greets,
Rav