A popped speaker is a speaker that has been damaged, causing the cone to become detached from the voice coil. This can happen for a number of reasons, including playing the speaker at too high of a volume, dropping the speaker, or puncturing the cone. When a speaker is popped, it will typically produce a distorted or muffled sound.
There are a few different ways to fix a popped speaker. One option is to replace the entire speaker cone. This is the most expensive option, but it will also give you the best results. Another option is to glue the cone back in place. This is a less expensive option, but it may not be as effective as replacing the cone. Finally, you can also try to repair the cone with a patch kit. This is the least expensive option, but it is also the least likely to be successful.