As Elizabeth mentioned, if the woofers are not making any noise at all, the voice coils may be shot. The woofers should move and play even if the surrounds are in need of replacement. I just replaced the surrounds on a nice pair of L100t3's I have, and it ran about $120 for the pair locally. (professionally done). The L100t3 is actually a pretty good sounding speaker for what they sell for ($650-$850 pr. used). Very dynamic and efficient, accurate tone and strong bass. A nice looking speaker too, if the cabinets are in good shape....Don't toss them out!