In some cases, the word "hammer" can be used to describe something that is loud, powerful, or intense. For example, a person might say that a band's performance was "hammering" or that a certain song has a "hammering beat." If the phrase "speakers going hammer" is being used in this sense, it could mean that the speakers are producing loud, powerful sound.
Alternatively, the phrase could also be interpreted as a metaphor. For example, if someone says that their speakers are "going hammer," they could be using it to describe the fact that the speakers are working extremely hard or are being pushed to their limits.
Without more context, it is difficult to say for sure what the phrase "speakers going hammer" means. It is possible that it is a slang or colloquial term that has a specific meaning within a certain group or community, or it could be interpreted as a metaphor.