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  1. remla1

    Lowpass filter for subwoofer

    :-\ hi, does this circuit need a pre-amp or it can drive power amp directly? I can't find potentiometers stated in the diagram here in our place we have here 50k and 25k pots we don't have 47k and 22k. Can I use them? Is there any effect in the cut-off frequency of the circuit...
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