An amplifier strengthens the input signal without any change in its waveform and frequency,The additional power required comes from the external dc source,Thus an amplifier is essentially an energy converter that draws energy from a dc supply and converts it into ac energy at signal frequency, the energy conversion process being controlled by the input signal.
Best power amps incorporating the best of tried-and-true design principles and innovative features
Crown XLS 5000D Power Amplifier
The Crown XLS5000 Power Amplifier represents affordable, high-quality power amplification.The Crown XLS 5000 is housed in a rugged rack-mountable, 3U, all-steel chassis incorporating the best of tried-and-true design principles and innovative features including an efficient forced-air fan to prevent excessive thermal buildup, dual precision-detented, rotary level controls and signal LEDs that indicate signal, clip and fault keeping you informed constantly about your signal flow. Balanced XLR input and Binding Post and Speakon output connections on the rear panel for solid mixer and speaker connection.

Best Power Amps – Schematic Diagram Amplifier
Employing extensive protection and diagnostics capabilities, the XLS 5000 includes output current limiting, DC protection, circuit breaker and thermal protection of the units transformers.
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Crown XLS5000 Power Amplifier (5000 Watts), Crown XLS602 Amplifier, Crown XLS802 Power Amplifier, QSC PLX3602 Lightweight Power Amplifier, Crown XLS202 Amplifier