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音频功率放大器的输出功率、频率响应、总谐波失真、信噪比,是衡量一台音频功率放大器电性能的主要技术指标。通常在其产品说明书中都标有该四项技术指标的参数。然而,目前市场上出售的音频功率放大器,在其产品说明书上,对该四项技术指标的表示方法却不确切,不完整,难以对其性能进行比较评判,这一现象应引起生产企业、消费者及质量监督检验部门的重视。本文结合国家及行业标准,谈谈音频功率放大器以上四项技术指标的意义及正确表示方法。
Audio power amplifier output power, frequency response, total harmonic distortion, signal to noise ratio, is a measure of an audio power amplifier electrical performance of the main technical indicators. Usually in their product manuals are marked with the parameters of the four technical indicators. However, the audio power amplifiers currently on the market, in their product manuals, express the four technical indicators inaccurately and incompletely, making it difficult to evaluate their performances. This phenomenon should cause manufacturers, consumers And quality supervision and inspection departments attention. In this paper, the national and industry standards, talk about the audio power amplifier above four technical indicators of significance and the correct way of expression.