Professional audio amplifier

Abstract

The invention relates to the technical field of power amplifying circuits, in particular to a professional audio amplifier. The professional audio amplifier comprises a power preamplifier and a power post-amplifier, wherein a built-in equalizer is connected between the power preamplifier and the power post-amplifier; the built-in equalizer is provided with a signal-through electronic switch; the professional audio amplifier further comprises a music signal detection and analysis circuit, and an electronic switch controller for controlling the signal-through electronic switch. During the use, the professional audio amplifier can modify the sound quality through the built-in equalizer according to characteristics of a loudspeaker box so as to achieve an effect that the professional audio amplifier is perfectly matched with the loudspeaker box; moreover, through the music signal detection and analysis circuit, the type of an input signal can be detected for conduction of corresponding control, so that an equilibrium curve cannot be measured with a conventional testing method,and a commercial information enciphering purpose of hiding the equilibrium curve is achieved; meanwhile, all indexes are in accordance with national and international standards; furthermore, the professional audio amplifier is provided with a variety of protection circuits, so that the professional audio amplifier has a perfect protecting function.

Description

technical field [0001] The invention relates to the technical field of power amplifier circuits, in particular to a professional audio amplifier. Background technique [0002] The power amplifier is the most basic equipment in the audio system. Its main function is to amplify the weaker signal input by the audio source equipment, and generate a large enough current to drive the speaker to reproduce the sound. Due to the consideration of power, impedance, distortion, dynamics, and different use ranges and control adjustment functions, different power amplifiers are also different in internal signal processing, circuit design and production technology. [0003] A general power amplifier (referring to a combined power amplifier) ​​includes a power amplifier preamplifier (also known as a power amplifier front stage) and a power amplifier rear stage. The power amplifier preamplifier is the pre-amplification and control part before the power amplifier, which is used to enhance th...

AI Technical Summary

Problems solved by technology

[0004] At present, mature analog equalizers at home and abroad will inevitably bring significant background noise to the power amplifier. Although it is not large, it will cause the signal-to-noise ratio of the power amplifier to fail the international standard. Therefore, many professional power amplifier manufacturers dare not build the equalizer into the power amplifier. professional power amplifier

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