Grounding is one of the most underestimated aspects of any A/V set. Grounding your A/V set is not only for safety reasons, it is also of utmost importance to prevent sound degradation due to all kinds of noise. Bad - or even worse - missing ground connections immediately have adverse effects on the performance of your A/V set. By using proper grounding, your set will perform better in all aspects you can imagine: significantly increased detailing, less coloration, a better sound stage imaging, etc. Highly recommended!