Hello, I have recently had a sky HD box fitted and had to buy the additional io link to feed my secondary TVs. Now I have started to notice a problem where I get a loud crackling sound on all the secondary TVs. Its almost as if the signal is too loud and distorting, but it seems to happen more during quiet parts of a movie etc so can not be to do with clipping. I haven't spoken to sky yet as I don't think they will want to know unless I can find some similar experiences. Any advice appreciated. thanks