More on Amazon.com : http://www.amazon.com/gp/product/B0017I3K9M?tag=purrfectcatdi-20 <br /> <br />Viewsonics VSIS-EU Cable TV Ground Loop Isolator <br /> <br />Helps eliminate audio hum and horizontal scrolling bars caused by ground loops <br />Low insertion loss - transparent to all cable TV signals and services from 100Hz up to 860MHz <br />Eliminates loops by isolating the ground connection between components so that currents cannot pass <br />Should be used to supplement a well grounded system AV Home Theater when grounding issues persist
