It has veen my experience that the rf extenders are only good for a range up to about 30 ft max if inside a cabinet. If it is inside an equipment cabinet, try to keep it as far as possible from 'motorized' components(DVD,CD,VCR,etc), also try to keep it as far as possible to any vent fan if you have one installed. And lastly, the one thing that will keep the rf extender from working is a RaddioRa system. Apparently they run on the same frequency.