蜘蛛网功放(S类)

在文献看到了AA类功放，再多浏览一下就看到了S类的 ，空闲时间做了两个出来，有一个是以前的，蜘蛛网那个是今天改进的，静态电流55毫安，lm49720+ad712运放推东芝管，试验时是用opa2604和op275测试的。没有IR的正温管，反正音质挺不错的，发热小，第一个运放要加散热器。

s类功放以前很流行，至少在d类没有普及的时候，原理就是惠斯通电桥平衡减小音频失真而已。
感觉这个蜘蛛网功放虽然难看了点 但高中低音都表现非常出色，有空装箱子进去。

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