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现在多媒体电脑里绝大多数采用有源音箱,受自身条件的限制,其音质远够不上“发烧”的水平。音量较小时高音丧失殆尽,音量开大后又顿感刺耳,而低音总是含糊不清,全然不能表现出多媒体软件那种逼真的音响效果。为此笔者参照有关资料制作了一款用耳机放音的Hi—Fi功放,奉献给《家庭电子》的读者们。电路如附图所示。其核心元件是两只“运放之皇”NE5532。NE5532在音响界可算是耳熟能详的优秀选手了:其电压转换速率高达9V/μs,因而高频瞬态失真大为降低,清晰度和解析力有口皆碑;110dB的通道分离度大大提高了声像定位准确
Now most of the multimedia computer with active speakers, subject to their own limitations, the sound quality is far from “fever” level. When the volume is low, the treble disappears, and the volume is loud and jarring, and the bass is always vague, which can not show the vivid sound effect of the multimedia software. For this purpose, the author made a Hi-Fi amplifier that uses a headphone to refer to relevant information and dedicated it to readers of “Home Electronics”. Circuit shown in the figure. Its core components are two “the emperor” NE5532. NE5532 in the audio industry can be regarded as a familiar player: the voltage conversion rate of up to 9V / μs, which greatly reduced the high-frequency transient distortion, clarity and resolution of the acclaim; 110dB channel separation greatly enhances the sound image localization accuracy