I have a little subwoofer controller with 2 dual NE5532 op amps that was built from an ebay kit PCB and works fine. I don't have a schematic but stereo input > stereo to mono resistors > gain stage > crossover filter with adjustment 20-200Hz > volume pot.
The question is that the output comes directly from a B50K pot and would like to add a cap (e.g. 4.7-10uF) after this but should I also add a resistor (e.g 100K) to signal ground?
I could add a buffer or an inverting / normal circuit but prefer to keep it simple as it works. This feeds a parallel LM4780 power amp with Zin 47K.
The question is that the output comes directly from a B50K pot and would like to add a cap (e.g. 4.7-10uF) after this but should I also add a resistor (e.g 100K) to signal ground?
I could add a buffer or an inverting / normal circuit but prefer to keep it simple as it works. This feeds a parallel LM4780 power amp with Zin 47K.
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Assuming that I'm visualizing your circuit accurately, then yes, add a resistor from the output side of the coupling cap. to signal ground. This is required so the the output side of the capacitor can charge down to ground when the component is powered-on.
