Try the above recommendations first. Worst case, you could remove the woofer, remove the magnet from the woofer and then push the dust cap back from the other side. That is very tricky and it is particularly tough to get the magnet back on right since it must be parallel at the outset before you screw the magnet back on. It takes a while to get that right. I did all that just last weekend for a different reason. Please be sure to call the manufacturer first since your speaker may be different and might require other techniques and tools. I just needed some allen wrenches and a putty knife. Again, be sure you contact someone who knows these speakers before doing this. Good luck.