What is inside a sound bar?


and how do they work?
I know they are some type of speaker, but WHAT are they? (I have "GOOGLED" but could not find a cut-away view). Do they contain speaker cone drivers or are they electrostatic? Is anyone looking into these?Do these have HE potential? I like the idea of speakers that can hang on the wall and still produce high quality sound.
6550c

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