Does the bottom of your speakers have holes already drilled for spikes. Can you post a pic of your speakers? If they are very stable ie not very tall, or squatty , or very heavy, you may be able to just put a cone under each corner. Lots of traffic close to the speakers or children and tall thin speakers will not work. Will they be on hardwood floor or on carpet? Putting one or two blocks of wood under the speaker, to raise them off the floor, will help you place the cones. If you have no holes drilled you could use a drill and tap the the holes in the wood. The holes must be drilled straight of course. After that it's not too hard to tap the wood hole straight.
