Having followed the opinions of buyers, I chose this cable 7m50 very invisible under carpets but I gave up using it because television (new) hardly showed strings and therefore there or manipulations had to be had to power cycle the BBox. I took a shorter cable (black, round and less discreet) and I close the BBox television and there, there is nothing to do, this is the box that do not know travaille.Je explain it, it might be necessary that I remove the obstacles between the box and the television and I directed him to the box, it was complicated. All I can say is that the sharpness of the image, when I managed to get one, was not altered by the cable length.