A complete line filter must include, a common mode double inductor in the line and neutral wires, a dual isolated inductor in each line wire, a large cap between lin and neutral (1 to 2.2 µF X2) and several Y capacitors in the order of .0047µF.
This way you cancell both common and differential interference to and from supply. remenber that if you have inductive load as a traffo in the amp side of the filter, the possibility of resonances.
This way you cancell both common and differential interference to and from supply. remenber that if you have inductive load as a traffo in the amp side of the filter, the possibility of resonances.