[klondike98]

One option for repairing tears in the cones is to patch them.  If you look around there are a number of threads by various folks on how they do it.  I was successful on a 60MB speaker using some coffee filters, elmers glue diluted 50/50.  You can always paint the repair to more closely match the cone color if needed.  

For some tears that are smaller, I've also just put some rubber cement over the tear (both sides if I can reach them).