When I plug the ADA745 speakers and subwoofer into my computer I get absolutely no sound from either of the four speakers nor the subwoofer. I have a newer HP desktop computer. Their is a sound card in the computer. Shouldn't the speakers and subwoofer just be plug and play?

I have the same exact speakers & subwoofer, but not getting any power to either one. Turns out all that was wrong was that the fuse on the subwoofer had blown. I purchased a new fuse at Radio Shack (4 for about $3), and then replaced the fuse (a T1A-250V). All working great now! By the way, when you buy the new fuse, make sure you get the 'Fast Acting' (not Slow acting) ones, 1 amp, 250V. The fuse is on the back of the subwoofer, use a flat-head screw driver to access. Hope this helps.

Yes the speakers are plug and play but you will need to go into control panel on your pc and set the configuration 4.1 surround