Morning all

I have recently bought a PowerMac G5 system with Pro Tools LE/Digi 002
Rack.

I already have a set of Tannoy Monitor speakers (which work extremely
well and suite my needs well) and Behringer Euro mixer.

All of the above worked well on the XP system running Cubase without
any monitor hum.

However, once I plugged the G5 in and configured the system up,
plugged the monitors into the Monitor outs on the 002 rack, I get
massive machine interference e.g. when I move the mac mouse the
monitors pick up the movement, and theres a really annoying rhythmic
low level hiss. Even when I turn off the 002 rack, I still get
interference from the mac through the monitor speakers.

As for positioning, the Mac is under my desk (solid oak) and the
monitors are on a shelf (about head level) just above the 2 x 17" flat
panel monitor screens that I'm using.

I've made sure that the monitor speaker cables from the 002 to the
monitors don't cross power lines and are completely away from any
power sources or transformers.

The power for the speakers is also isolated away from the Mac power
source so as to avoid any power interference.

Do any of you guys know what else I can try? I'm really impressed
withy the Mac system config but I can't use it when theres so much hum
coming from the monitors.

All and any help greatly appreciated.

Thanks

S.