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给立体声放音机加装功率放大器 随身听(立体声放音机)因放音质量相当不错而成为众多音响音乐爱好者和发烧友的宠物,其社会拥有量十分巨大。然而一般的随身听只能以32Ω阻抗耳机放音供个人收听;若想在家庭中让多人聆听其发出的优美悦耳的乐曲,可以加装一个可推动小型音箱的音频功率放大器。本文介绍这种功率放大器的基本工作原理和具体加装方法。 1.电路基本原理 通常,随身听的输出负载为中低阻抗的高保真立体声耳机,所需推动功率不大,故机内的音频功放集成电路采用小功率低(电源)电压器件。如爱华HS—T28、RD7、
Power Amplifier for Stereo Amplifier The Walkman (Stereo Player) is a great pet for many audio music lovers and enthusiasts because of its very good playback quality. However, the general Walkman can only be 32Ω impedance headphones for personal listening; if you want to let many people in the family to listen to the beautiful melodious music, you can install an audio power amplifier to promote a small speaker. This article describes the basic working principle of this power amplifier and the specific installation method. 1. The basic principles of the circuit Usually, the output of the Walkman is low-impedance high-fidelity stereo headphones, the power needed to promote small, so the machine’s audio amplifier IC with low power (power) voltage devices. Such as Epworth HS-T28, RD7,