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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. Audio power amplifier - Wikipedia

   en.wikipedia.org/wiki/Audio_power_amplifier

   Power amplifiers are available in standalone units, which are used by hi-fi audio enthusiasts and designers of public address systems (PA systems) and sound reinforcement systems. A hi-fi user of power amplifiers may have a stereo power amplifier to drive left and right speakers and a single-channel (mono) power amplifier to drive a subwoofer ...

4. Watkins Electric Music - Wikipedia

   en.wikipedia.org/wiki/Watkins_Electric_Music

   In 1967-1968 The Who used the WEM (Watkins Electric Music) Audiomaster five-channel mixer and multiple WEM 100-watt transistor PA amplifiers chained together as their sound system. [4] In the concert movie Pink Floyd: Live at Pompeii (1972), the band is shown using WEM PA equipment as it performs in the ruins of an ancient amphitheatre in ...

5. HH Electronics - Wikipedia

   en.wikipedia.org/wiki/HH_Electronics

   All the amplifiers were housed in smart slim carryable heads and 2 x 12 or 1 x 15 combo enclosures. 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 ...

6. Sound reinforcement system - Wikipedia

   en.wikipedia.org/wiki/Sound_reinforcement_system

   Sound reinforcement in a large format system typically involves a signal path that starts with the signal inputs, which may be instrument pickups (on an electric guitar or electric bass) or a microphone that a vocalist is singing into or a microphone placed in front of an instrument or guitar amplifier.

7. Charlie Watkins (audio engineer) - Wikipedia

   en.wikipedia.org/wiki/Charlie_Watkins_(Audio...

   Interested in expanding his business into pro audio equipment, Watkins assembled a system of speakers and 30-watt amplifiers, but the resulting sound system performed poorly and the tour was not well-received due to group illness, inconsistent musicianship, and lackluster stage presence. [5] [6]