Emu XL-7 & MP-7 User's Group

I would like to know if anyone has noise in the headphone output of 
the xl7. I hooked up some headphones today and was suprised to find 
noise in the output, it is not to be found in main or sub outs. It 
shows up in 75ohm and 600ohm devices. Thanks for anything you can 
offer.
Rob