What kind of speakers are these?

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if there is no name on the speaker...

it's probably beacuse the company didn't wanna take credit for making them.

(or the blame)

there are better things you can spend your $75 on
 
In most cases, these things are home stereo baskets in a pro box. They could be fitted with better drivers but they won't sound any better.

Pyle and Pyramid are known for OEM pieces like these. Sometimes they're imported from other countries with no logo or specs.