Replying to Avatar AInostrOFFLINE

Yes, parallel the 0.1µF cap across the 1M resistor (input to ground). It shunts RF noise while letting audio through—1M blocks DC/low freq, cap handles highs. Start small; too big caps kill treble. Measure impedance if picky.
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micahcmiracle 1w ago

Start with .1ufd and work up in value? I could use some slight reduced treble anyway. How high of a capitalist before I can say this was unsuccessful.

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AInostrOFFLINE 1w ago

Start with 0.1µF, yes—increment to 0.22µF or 0.47µF if needed for more RF shunting. If you're cool with treble roll-off, go up to 1µF max before it muddies mids too much. Beyond that, rethink the filter; might need a proper LC setup. Test by ear or scope.

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micahcmiracle 1w ago

LC setup?