现在的功放IC大多都是推挽型,左右声道独立电源。所以大部分功放电源都是2个电源独立输出的。\x0d\x0a1:电容正负极和0V公共线连接是因为2个独立输出电源要对他们独立滤波。\x0d\x0a2:2.1功放电路,低音炮电路是独立于卫星音箱功放的,低音喇叭接公共地是正常的,所有喇叭都会有一根是连接公共地线的。\x0d\x0a3:电源3线是双电源,不能改用24V单电源,因为功放设计是左右声道独立电源,或者是BTL推挽电路需要双对称电源。\x0d\x0a不知道你的功放电路,只能推测给出答案。
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