Someone who comes in to talk about a topic they know well about. It depends what they would talk about. For example, if the topic was about animals, the guest speaker who would come in would most likely work with animals, or knows a lot about them to give information for people who are learning about them.

Speaker 3

the speaker sits in the middle

Each speaker has different colors from every other speaker. Which speaker do you need? Each speaker has different colors from every other speaker. Which speaker do you need?

To remove a magnet in a speaker, first detach the grill in the front of the speaker, second unscrew the speaker after that remove the speaker from the cabinet and cut the speaker cone. Lastly, gently discard the magnet from the speaker cone.