[QUOTE=Matth;2011500]The problem is the channel routing.
2 speaker mode - outputs left & right with bass included, the 2.1 set does the bass splitting.
4 speaker mode - like 2, but with an extra pair for rear.
6 speaker - splits the bass and centre as seperate channels, with front L/R and rear L/R pairs, when the bass actually needs to hit the 2.1 set.
A kludge that might work, plug the 2.1 set in as bass/centre so it gets the bass (which should be filtered to the bass unit by the 2.1 amplifier) and the centre (to one of the 2.1 set satellites).
Then use the best of the 2.0 sets for the front, and add a cheap 2.0 for the rear.
Whether it’s worth doing at all, depends on the source, the centre speaker can be a pain to place (mine is behind the LCD monitor) and is really only of value with 5.1 source material.[/QUOTE]
that’s not quite true. all sound cards even in 5.1 mode only output 5 channels of information for most sounds. the lfe channel is not separated out to the .1 channel at all. only in the case of DVD playback I believe is lfe routed to the .1 channel, and even then you have the option of telling the software (powerdvd and windvd both have this option) to route the lfe into the front channels. all PC multimedia speaker systems have a built in crossover for any of the channels except the lfe channel, so even if you route all lfe into the front channels, all the bass is rerouted into the subwoofer by the speaker system. remember, the whole point of lfe is that the frequency range is below the localization range. the option that some soundcards have of having a software crossover is to simplify connections to a HT system, where there is often no crossover for the direct 6ch input.