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2. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.

3. List of speakers of the Pennsylvania House of Representatives

   en.wikipedia.org/wiki/List_of_Speakers_of_the...

   Wisdom, Vision and Diplomacy: Speakers of the Pennsylvania House (A Biographical History of the Speakers of the Provincial Assembly and the House of Representatives, 1682-1998). Harrisburg, PA: Pennsylvania House of Representatives. ISBN 978-0-9667794-0-0. OCLC 40553654. "Speakers of the Provincial Assembly (1682-1790) (page 14/28)" (PDF).

4. HH Electronics - Wikipedia

   en.wikipedia.org/wiki/HH_Electronics

   Many new PA speaker cabinets were designed and put into production, such as the 212 & 412 Dual Concentric, 212BL, 215BL, 412BL, 115PA Radial Horns and Bass Bin + Piezo plus the Concert Series of pro PA systems. A large range of studio and live mixing consoles, from an 8:2 to a 24:8:2, was designed and manufactured in the early 1980s, plus an HH ...

5. 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 ...

6. Pennsylvania House of Representatives - Wikipedia

   en.wikipedia.org/wiki/Pennsylvania_House_of...

   The Pennsylvania House of Representatives is the lower house of the bicameral Pennsylvania General Assembly, the legislature of the U.S. state of Pennsylvania. There are 203 members, elected for two-year terms from single member districts. [ 1 ][ 2 ] It is the largest full-time state legislature in the country.

7. Stage monitor system - Wikipedia

   en.wikipedia.org/wiki/Stage_monitor_system

   A coffeehouse or small bar where singers perform while accompanying themselves on acoustic guitar may have a relatively small, low-powered PA system, such as a pair of two 200 watt powered speakers. A large club may use several power amplifiers to provide 1000 to 2000 watts of power to the main speakers.