Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems Sorting out Ground Loop problem with Modded Oppo

Try to turn the power plug 180 degrees. Sometimes it will help.
If the Oppo have a ground wire and you are familiar with a DVM, you can measure the ACvoltage between ground on the wall outlet and the chassis when you first remove the groundwire on the Oppo.
Then turn the power plug 180 defree and measure again.
The side with the lower voltage should be used.
Then mount the ground wire again on the chassis for safety reason,
if something breaks in your Oppo, you definetly have a bad accident-there is no joking here !!
You could do that with all your equipment,but normlly that not necssary as a good manufacturer have marked the hotline of your power or there is no influence at all.
But dont forget to plug the ground wire again !!
If all that doesnt help, you have to use "dehum" box what is actually a little isolation transformer in your signal line.