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请教TPA6120A2 是否须要接输出耦合电容问题;



 Dear 

 如图,便捷式的播放上使用,如果不加输出耦合电容,原本耳放工作电流在70ma左右,接32欧或其他阻抗的耳塞

电流300多ma,短路一样;有排除过电源问题;

PS:加输出耦合电容正常,声音正常;麻烦各位分析一下,告知原因,感谢!