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tpa3116频率响应高端过不了

ti工程师:

       我用3116做了款功放,电路按参考pbtl电路,输入2vpp,26db增益,输出14v有效值,喇叭4欧姆,50瓦。

       单端输入用10uf电容,输出10uh加105电容。现在要求频率响应80到12.5khz不超过正负1.现在低端每问题,高端12.5k有1.2到1.5。哟可以从哪几个地方整改啊。

        非常感谢。