So I've got an old iMac running Pro Tools and an MBox 2 mini usb interface.
I'm getting a 1kHz whine through my speakers when I connect them to the MBox. I don't get any whine when I plug headphones directly into it, so it's an earth loop problem.
I don't particularly want to disconnect the earth lead from either the amp or the iMac (which world solve the issue).
I do have an old Radio Shack isolator somewhere (basically a 1:1 audio transformer) but I remember that dulling the top end a bit.
Any (sensible) suggestions for fixing an earth loop like this?
Donald Trump needs kicking out of a helicopter
Offset "(Emp) - a little heavy on the hyperbole."
Comments
If balanced to balanced disconnect the signal earth at one (MBox) end.
Offset "(Emp) - a little heavy on the hyperbole."
https://www.soundonsound.com/techniques/ground-loops-explained
Si