Sorry if this is a stupid question. I did a search and found way too many responses that didn't answer my question. I went to Ratshack and asked for the ground loop isolator. The one that they gave me has two rca jacks on both sides of the isolator. Did I get the right one? If so, what two components does it go between. I believe my grounding problem comes from the cable box since the humm goes away when I disconnect the coax from the cable box. However, my cable box does not accept rca connectors, only coax. Any help is much appreciated.