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They are called "PA" speakers. PA meaning "Public Address" is a large loudspeaker design to deliver sound to a large group of audience.

You'll often see these large speakers at clubs, concerts, and cinemas.

There are two types of PA speakers. "Passive" and "Active" speakers.

The passive speakers doesn't have a built-in amplifier. These speakers will require the use of a power source called an "Amplifier" to power these speakers.

The active speakers have a built-in amplifier and doesn't require the use of an amplifier.

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Q: What are the big speakers at a concert called?
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