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2. Loudspeaker enclosure - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker_enclosure

   Acoustic suspension or air suspension is a variation of the closed-box enclosure, using a box size that exploits the almost linear air spring resulting in a −3 dB low-frequency cut-off point of 30–40 Hz from a box of only one to two cubic feet or so. [16]

3. Clair Global - Wikipedia

   en.wikipedia.org/wiki/Clair_Global

   In 1974 Clair Brothers introduced their S4 all-in-one PA speaker. A radical departure from the different sized modular boxes generally used in large concert PA systems of the time. The S4 was a single box full range 4-way speaker weighing 425 lbs with integrated rigging hardware for suspending from the roof or superstructure of an auditorium or ...

4. Electro-Voice - Wikipedia

   en.wikipedia.org/wiki/Electro-Voice

   In 1978, Electro-Voice patented its Constant Directivity Horn, which produced an even balance of frequencies across the listening field. It overcame the uneven dispersion of high frequencies that affected the typical high frequency horns used in many professional sound speakers until the late seventies. [1] Also in the 1970s, EV acquired TAPCO.

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

6. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   Mid-size PA system: 4 larger multiwoofer mid/high frequency PA speaker cabs (e.g., each with two 15" woofers) and four subwoofer cabinets, either front-firing, manifold loaded or a folded horn Large clubs with capacity for 500+ people, small music festivals, fairs

7. For the first time in nearly 50 years, a Pennsylvania animal ...

   www.aol.com/first-time-nearly-50-years-124951513...

   Just two weeks ago, the Adams County, Pennsylvania, SPCA was near capacity as its kennels were filled with dogs needing homes. Now, for the first time in nearly 50 years, there are no dogs at the ...