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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. Peavey Electronics - Wikipedia

   en.wikipedia.org/wiki/Peavey_Electronics

   Peavey Electronics Europe, Ltd. Website. www.peavey.com. Peavey Electronics Corporation is a privately-owned American company which designs, develops, manufactures, and markets professional audio equipment. [2] Headquartered in Meridian, Mississippi, Peavey is one of the largest audio equipment manufacturers in the world.

4. Hartley Peavey - Wikipedia

   en.wikipedia.org/wiki/Hartley_Peavey

   Hartley Peavey (born December 30, 1941) is an American entrepreneur who is the founder and CEO of Peavey Electronics Corporation, a musical equipment innovation and production company. A 1964 graduate of Mississippi State University , Peavey has been recognized by his alma mater as an Alumni Fellow and as the 2004 commencement speaker.

5. In a time before PA systems, rodeos used a guy with a loud ...

   www.aol.com/time-pa-systems-rodeos-used...

   The loudspeaker system was invented. That meant that producers didn’t have to pay for the rare person with both announcing skills and a loud voice. Now all they needed was a person who could ...

6. List of WLAN channels - Wikipedia

   en.wikipedia.org/wiki/List_of_WLAN_channels

   Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.

7. 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 ...