Hi, I bought a philips HTS 3400 home theater 'in a box' system. It was cheap and sounds great. It is a progressive scan DVD player with a built in amp (100x6) so the speakers hook right up to it. The big problem is that this thing has no surround inputs. I want to run my xbox and my cable tv in surround sound but with no inputs on the philips unit, it seems I am SOL unless i get another receiver right? So I have resigned myself to spending another 100-200 bucks on a good used receiver on ebay. The problem is that the subwoofer that came with the philips system is passive and is powered from the unit. I haven't been able to find any receivers on ebay with a powered output specifically for the sub, only line out. However all these 6.1 channel units have a powered output for a 3rd rear surround speaker which I don't have. Can I use that for the sub? I really want the ".1" surround from my sub, you know.. I want 'correct' surround sound. I have heard of connecting the front speaker outputs to the sub and then from the sub to the front speakers but the sub doesn't have any inputs. I also heard that this wouldn't be the correct '.1' surround and only the low pass from the front speakers. I could get a separate sub amp but I don't want to try and run over 100w rms to the sub since that is what it is at now. Any suggestions?