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2. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   Some PA systems have speakers that cover more than one building, extending to an entire campus of a college, office or industrial site, or an entire outdoor complex (e.g., an athletic stadium). A large PA system may also be used as an alert system during an emergency. PA systems by size and subwoofer approach

3. Keyboard amplifier - Wikipedia

   en.wikipedia.org/wiki/Keyboard_amplifier

   Some keyboard players use powered PA speakers (also called "active speakers") with their keyboards. Powered PA speakers are speaker enclosures with a built-in power amplifier and, in some cases, other electronic components. In the 2010s, there is a convergence between the functionality of powered speakers and small PA systems, because some ...

4. Yorkville Sound - Wikipedia

   en.wikipedia.org/wiki/Yorkville_Sound

   In 1985, two new product lines appeared with the introduction of the "élite" series of portable loudspeakers with non-user adjustable 'black box' processing and the "Audiopro" line of electronic amplifiers. A thousand-watt subwoofer was brought out in 1986: the SW-1000. [15] A line of studio monitor speakers was created in 1991. [15]

5. Loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker

   With sound reinforcement system, PA system and instrument amplifier speaker enclosures, cables and some type of jack or connector are typically used. Lower- and mid-priced sound system and instrument speaker cabinets often use 1/4" jacks. Higher-priced and higher-powered sound system cabinets and instrument speaker cabinets often use Speakon ...

6. Tannoy - Wikipedia

   en.wikipedia.org/wiki/Tannoy

   Tannoy became a household name due to widespread and high profile adoption during and after the war, each speaker having the Tannoy logo prominently displayed on the speaker grills. As a result, the term "tannoy" came to be used in British English for any public-address system, and as a verb, to "tannoy", for making an announcement in a public ...

7. Powered speakers - Wikipedia

   en.wikipedia.org/wiki/Powered_speakers

   An active full-range loudspeaker. Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers facing the audience and the monitor speakers facing the performers; by DJs performing at ...