OK just bouncing this off some peeps & I think I know the outcome but worth a try! When I watch Sky the sound from the rear speaker is 'sploshy' ie. the treble sounds are distorted & hissing. I have the system on Dolby PLII which enhances the prob. I think this could be several things but need an experts opinion: - sky's broadcasts are just sh*te; we know that & that's the problem. - I have the system on optical sound from a sony VTX-S750U receiver - that's the problem - a problem with the surround system? Any idea?