The 4 surround speakers and the subwoofer are working fine. The speaker on/off/volume that is attached to the subwoofer by a cable has not had sound for years and I only use it to turn the sub and surrounds on. Your answer to another poster allowed me to use max  pro to set the system up. I agree that it is somewhat difficult to use. Thanks,   KBr
I have an old Dell 5.1 speaker setup (MMS 5650) where the cables go from the PC to the subwoofer and then out of the subwoofer to the speakers.  On the new XPS 8940 I have three ports for the sound card. Green, black, and orange. Conveniently, my Dell speaker output wire has three plugs, a green, black, and orange. However, I can’t get it to work correctly. I chose a random one when I plugged it in for the first time and it prompted me to choose amongst the models, none of which were mine. I chose one that seemed like a 5.1 system, I think.  My issue is this: If I choose “headphones” as the sound output in Windows, the left, right and sub works fine (I’m not using the 2 rears), however the center channel and volume knob on the center do nothing.  If I choose “Speakers” as the sound output in Windows, ONLY the center channel speaker works (it has left and right also, built into it). The volume knob really doesn’t seem to do anything still though.  So, I’m stuck finding out how to make it work as intended, where the center channel works along with the Left, Right, and subwoofer.  [IMAGE] [IMAGE] [IMAGE]   [IMAGE]          
XPS 8940, old MMS 5650 5.1, audio setup