说起动态扩张器,或许大家都不会陌生。它的作用是使录音时被压缩的信号在放音时予以扩张还原,尽量恢复录音时的实际音响效果。而笔者在这儿所说的动态扩张器,则是另外一种功用,它不是使录音中的信号还原,而是使音乐信号中的现有的动态范围进一步扩大,井且不需要使用像三极管以及集成电路之类的有源器件,而且原理极为简单。这还得从去年盛夏说起:当时笔者突发奇想,想把单位里的几对专业音箱,特别是那对体积庞大的美国Auido Cen- Speaking dynamic dilator, perhaps we are not unfamiliar. Its role is to make the compressed signal during playback to be expanded to restore, try to restore the actual sound when recording. What I mean here is that the dynamic expander is another function. Instead of restoring the recorded signal, it expands the existing dynamic range in the music signal without the need of using transistors such as transistors and Active devices such as integrated circuits, and the principle is extremely simple. This has to be said from the summer of last year: I was a whim, I wanted to unit a few pairs of professional speakers, especially for the bulky United States Auido Cen-