hi all , ive got openbox x3 hd pvr ,i recently set up a 2.1 speaker with subwoofer system connected to my tv by 3.5 jack point, since then the sound on my x3/tv has to be turned up to its limit ? ,the sound system works fine with my sky and xbox ,the x3 was fine before this ,have since disconnected the whole sound system but still have sound problem with x3 any help .thanks