To add to what Stehno is saying.....there is a good quality audio power strip called the "PAC-IDOS". It is not a surge protector. The "Digital" AC outlet is grounded and the outlets for the rest of the components are not grounded.
So the noise created by the digital source is sent to ground. The other components are not grounded, so they are protected. There is some minor filtering also I think. I have played around with one, and there was a reduction in the noise floor.
So the noise created by the digital source is sent to ground. The other components are not grounded, so they are protected. There is some minor filtering also I think. I have played around with one, and there was a reduction in the noise floor.