An electronic device that increases the volume of a signal. A basic unit of all sound systems. Power amps are typically connected to a preamp which provides controls for individual functions: level, t [..]

A power amplifier (PA) is defined by the ratio between the power supplied to the load and the power provided to the circuit by the source. A PA is categorized on the basis of its power rating, which i [..]

Converts sound signals of line level (approx. 1 volt) into tens of volts, with currents of around 1 Amp to drive speakers.

A device that takes a line level signal and amplifies it to be able to drive a speaker.

An amplifier in which the output-signal power is greater than the input-signal power. A amplifier designed to drive a speaker or other transducer. An amplifier with a relatively large power gain when [..]