I will ask this too, because my problem is a bit similar, but I don't want to start a new topic.
I have an LCD TV, DVD and Chinese home theater speakers. There is a built-in amplifier in the subwoofer and there are 6 CHINCH inputs. There are 6 analogous outputs in the DVD and everything works fine, but only when I watch a movie on DVD (not very often in my case). I would like to connect these speakers to a TV (optionally in the near future to a digital decoder), of course I know that it will not work in a 5.1 system, but 2.1 should be possible. The output from the TV can be via headphones or a SCART adapter, but I do not know how to connect it to give a signal from two channels to 2 speakers and a subwoofer. Is it enough to connect the left and right channels from the TV to the left front and right front in the subwoofer, and the sub itself to any channel, or are there any adapters from 2.0 to 2.1?
[EDIT] I read a bit and I know that I need a channel combiner, but on the simplest (two resistors) there will be "crosstalk" (I guess it is about the interference of the independence of the channels on the satellites). Is there a ready-made adapter-combiner, or do you donate and connect the subwoofer to one channel (I'm not an audiophile, but the TV speakers piss me off).