I am almost finished implementing the SR Active Ground Block in my system using a mix of the supplied SR wires and some DIY ground wires. This built upon a DIY star grounding project I began some time ago. While I found audible benefits from basic star grounding, adding the SR Active Ground Block made a huge improvement in the sound of my system. The SR ground wires--especially the High Definition cables--are really expensive for what you get. Don't be afraid to try your hand at making your own.