What kind of loudspeaker can be made?

Question

Do it yourself

The situation is this: there are 5 completely different speakers and different types (two woofers, a tweeter and a broadband speaker). It's a pity to throw it away, it's almost pointless to sell it. I would like to make a system out of them in some original building or something useful for teaching students. Question: what?

Answer 1

Loudspeaker with a circular pattern (in the magazine Radio published more than once). Even if you really want originality.

Answer 2

What should students be taught? What is the topic?

Answer 3

I don't know how to do it, but it's difficult. You can buy it https://rupor-megafon.ru.