I am setting up a Mac Mini 2.0Ghz + MBox 2 Pro setup. I am running OS 10.4.10 & PTLE 7.1.3.
The Mbox 2 Pro is connected to a Denon Hi-Fi amp for playback. Unfortunately as soon as I connect the monitor outs of the Mbox 2 Pro to the inputs of the Denon I get unacceptable levels of noise out of the speakers.
Key things to note here:
- The noise comes out both the MBox channel on the HiFi amp AND the other connected channel - Mac in-built audio (It is actually LOUDER on the in-built audio channel!).
- The noise disappears immediately if either the audio or the FW cables to the MBox are disconnected.
- The h/phone output of the MBox is totally clean and functions as expected with PT.
- The noise is software dependant (i.e. its level/timbre corresponds to activity on screen).
Once I register the Mbox I should get the 7.4 update through the post but I have a funny felling that this is a hardware issue.
I am also considering lifting the earth on the audio cables to see if that fixes anything (although I am sceptical because everything is powered from a single mains strip).
Any help or suggestions will be extremely gratefully recieved!