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2. Cerwin-Vega - Wikipedia

   en.wikipedia.org/wiki/Cerwin-Vega

   The Cerwin-Vega brand was split for some time across two companies; Gibson for Cerwin-Vega and CVDA Holdings for Cerwin-Vega Mobile. In both lines their products are mostly known for its woofers and subwoofers capable of delivering high sound level output with comparatively low frequency ranges using comparatively low power input, as well as the red ring commonly found on the surround of many ...

3. Sensurround - Wikipedia

   en.wikipedia.org/wiki/Sensurround

   Sensurround involved the installation of large, low frequency, horn-loaded speakers which contained specially designed 18-inch Cerwin-Vega Model 189 ES drivers in custom black wood cabinets. Three horn configurations were available, Model-C (Corner), Model-W (Folded Bass Bin) and Model-M (Modular).

4. List of loudspeaker manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_loudspeaker...

   PMC speakers: United Kingdom Polk Audio: United States ProAc: United Kingdom PSB Speakers: Canada QSC Audio Products: United States Quad Electroacoustics: United Kingdom (brand) Radio Shack: United States RCF audio: Italy Rectilinear Research Corporation: United States Rega Research: United Kingdom Renkus-Heinz: United States ReVox: Switzerland ...

5. Subwoofer - Wikipedia

   en.wikipedia.org/wiki/Subwoofer

   From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...

6. Earthquake (1974 film) - Wikipedia

   en.wikipedia.org/wiki/Earthquake_(1974_film)

   After several ideas were tossed about (which included bouncing styrofoam faux "debris" over audience members' heads), Universal's sound department came up with a process called "Sensurround" – a series of large speakers made by Cerwin-Vega powered by BGW amplifiers, that would pump in sub-audible "infra bass" sound waves at 120 decibels ...

7. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   A large club may use amplifiers to provide 3000 to 5000 watts of power to the "main" speakers. An outdoor concert may use 10,000 or more watts. The monitor system reproduces the sounds of the performance and directs them towards the onstage performers (typically using wedge-shaped monitor speaker cabinets), to help them to hear the instruments ...