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2. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   Battery-powered systems can be used by guides who are speaking to clients on walking tours. Public address systems consist of input sources (microphones, sound playback devices, etc.), amplifiers, control and monitoring equipment (e.g., LED indicator lights, VU meters, headphones), and loudspeakers.

3. Automotive head unit - Wikipedia

   en.wikipedia.org/wiki/Automotive_head_unit

   An automotive head unit, sometimes called the infotainment system, [1] is a vehicle audio component providing a unified hardware interface for the system, including screens, buttons and system controls for numerous integrated information and entertainment functions. Other names for automotive head units include car stereo, car receiver, deck ...

4. Bridged and paralleled amplifiers - Wikipedia

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

   The bridge mode option is often used in PA systems and especially in car audio applications to feed bass loudspeakers at high power. Car audio amplifiers commonly have only a notional 13.8 volt supply, which would ordinarily limit the voltage swing available at the output to + and − 6.9 volts.

5. Audio crossover - Wikipedia

   en.wikipedia.org/wiki/Audio_crossover

   Audio crossovers are a type of electronic filter circuitry that splits an audio signal into two or more frequency ranges, so that the signals can be sent to loudspeaker drivers that are designed to operate within different frequency ranges. The crossover filters can be either active or passive. [1] They are often described as two-way or three ...

6. Vehicle audio - Wikipedia

   en.wikipedia.org/wiki/Vehicle_audio

   Mobile players for physical media have been provided for vinyl records, 8-track tapes, cassette tapes, compact discs, and MP3s.The increased sophistication of the vehicle audio system to accommodate such media has made the audio unit a common target of car break-ins, so these are equipped with anti-theft systems too.

7. Cerwin-Vega - Wikipedia

   en.wikipedia.org/wiki/Cerwin-Vega

   Cerwin-Vega Inc. is a brand name used on products for professional audio components, as well as home audio speakers, and car audio components. Originally a stand-alone company, Cerwin-Vega was acquired by the Stanton Group [1] after declaring bankruptcy in 2003. In 2007, Stanton sold off the mobile products division to CVM Acquisition Services ...