I've recently purchased a Philips LX7500 system & having been testing out the sound quality from several sources, I'm wondering if there is a problem, or if I'm just being too picky! When listeneing to Sky through the system (not optical channels, i.e. movies), if it uses the standard stereo effect (just the front speakers), everyhting is ok. If i then change the effect to use the rear\centre speakesrs, the sound coming through the rear speakers is slightly distorted. For example, if someone is speaking, it comes through the rears as a low squeel, there is no clear voice clarity. Similarly on some dvd's which aren't in dolby digital, if a surround effect is on, the clarity of sound isn't 100% through the rears. DVD's in dolby digital\music cd's are ok when a surround effect is used. Is this expected, playing a source using the surround sound that is supposed to played in stereo sound (i.e. just the front speakers)??? Or have i just bought a rubbish system???