PaulD 10+ year member
self-imposed ban
as I was saying, if you are just trying to annoy your neighbors then it will not be important but it does generally allow you to turn the gain down on the amp, which will result in less hiss. Evry audo system has noise of some kind or another - the question is: can you hear it. Most of the SQ guys went to fiber to break the copper link so there is no ground loop issues between the head unit and the amp/processors in the back.