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2. Crown International - Wikipedia

   en.wikipedia.org/wiki/Crown_International

   The first grounded bridge product released by Crown was the M600 amplifier (1974) primarily employed for commercial sound installations including constant voltage loudspeaker systems. [8] Crown received a patent for the invention in 1974. [9] After proving itself in the field, the topology was used to design the Microtech MT-1000 in 1984. [7]

3. Valve audio amplifier - Wikipedia

   en.wikipedia.org/wiki/Valve_audio_amplifier

   A valve audio amplifier or vacuum tube audio amplifier is a valve amplifier used for sound reinforcement, sound recording and reproduction. Until the invention of solid state devices such as the transistor , all electronic amplification was produced by valve (tube) amplifiers.

4. Instrument amplifier - Wikipedia

   en.wikipedia.org/wiki/Instrument_amplifier

   A small combo amplifier patched into the PA suffices. In the 2000s, virtually all sound reaching the audience in large venues comes from the PA system. Onstage instrument amplifiers are more likely to be at a low volume, because high volume levels onstage make it harder for the sound engineer to control the sound mix.

5. Amplifier - Wikipedia

   en.wikipedia.org/wiki/Amplifier

   An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude (magnitude of the voltage or current) of a signal applied to its input ...

6. Linear amplifier - Wikipedia

   en.wikipedia.org/wiki/Linear_amplifier

   In DPD power amplifier systems, the transfer characteristics of the amplifier are modeled by sampling the output of the PA and the inverse characteristics are calculated in a DSP processor. The digital baseband signal is multiplied by the inverse of PA nonlinear transfer characteristics, up-converted to RF frequencies and is applied to the PA ...

7. Crown, Pennsylvania - Wikipedia

   en.wikipedia.org/wiki/Crown,_Pennsylvania

   Crown is a census-designated place [3] in Farmington Township, Clarion County, in the U.S. state of Pennsylvania. The community is located along Pennsylvania Route 66 in northern Clarion County. As of the 2010 census the population was 183.