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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. DI unit - Wikipedia

   en.wikipedia.org/wiki/DI_unit

   DI unit. A professional passive DI box. It is passive because it does not need external power to operate. DI boxes which require a power source (batteries or phantom power) are called active DI boxes. A DI unit (direct input or direct inject) is an electronic device typically used in recording studios and in sound reinforcement systems to ...

4. Bass amplifier - Wikipedia

   en.wikipedia.org/wiki/Bass_amplifier

   Bass amplifier. An Ampeg SVT cabinet with eight 10" speakers, with a separate Ampeg SVT amplifier "head" on top. A Yamaha B100-115 combo amp, which contains a 100 watt amplifier and one 15" speaker in a wooden cabinet. A Hartke 500 watt amp "head" on top of an Ashdown 4x10" speaker cabinet. A bass amplifier (also abbreviated to bass amp) is a ...

5. JBL - Wikipedia

   en.wikipedia.org/wiki/JBL

   Website. jbl .com. JBL is an American audio equipment manufacturer [ 1] headquartered in Los Angeles, California, United States. JBL serves the home and professional market. The professional market includes studios, installed/tour/portable sound, music production, DJ, and cinema markets. The home market includes high-end home amplification ...

6. Bridged and paralleled amplifiers - Wikipedia

   en.wikipedia.org/wiki/Bridged_and_paralleled...

   Bridged or paralleled modes of working, normally involving audio power amplifiers, are methods of using a two or more identical amplifiers to drive the same load simultaneously. This is possible for sets of mono, stereo and multichannel amplifiers since the amplifier outputs are combined on a per load basis. Depending on the method of combining ...

7. VU meter - Wikipedia

   en.wikipedia.org/wiki/VU_meter

   VU meter. A volume unit ( VU) meter or standard volume indicator ( SVI) is a device displaying a representation of the signal level in audio equipment. The original design was proposed in the 1940 IRE paper, A New Standard Volume Indicator and Reference Level, written by experts from CBS, NBC, and Bell Telephone Laboratories. [ 1]