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Entries found for search: power

power bandwidth : The bandwidth of an audio device such as a power amplifier, measured while delivering its full rated load. This is limited by the slew rate of the device and is always narrower than the small signal bandwidth.

power factor : See also watt, VA.

power level : See level.

power ratio : See decibel, voltage gain.

power amplifier : A device n amplifier that accepts a low-level audio signal and strengthens, or amplifies, it to a suitable voltage and current level adequate to drive a loudspeaker or similar load. The four key parts of a power amplifier are the input stage (voltage gain), driver stage (phase splitting), output stage (load response), and power supply. See preamplifier, active, differential amplifier, integrated amplifier, combining amplifier.

power : (1) Electric power: The time time-rate of doing work or the rate at which energy is used. A watt of electrical power is the use of one joule of energy per second. Watts of electrical energy equals volts times amperes. See Appendix B. (2) Acoustic power: The number of watts of energy produced by any sound source or transducer. See acoustic intensity.

phantom power : DC power (usually 9V to 52V) supplied to condenser microphones by a preamplifier close to the microphone, necessary due to the extremely high impedance of the microphone, via the signal wiring of the microphone.

output power : The lower level that a system outputs under a specified load. Expressed in VA or RMS (watts). See also power bandwidth, rated load.

Power Fader Controls volume relation between front and rear speakers connected to built-in amplifier.

power loaders System loads and ejects CD or Tape automatically.



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