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The capacitor(s) in your guitar’s tone control influence its sound greatly. The lower the cap’s value, measured in microfarads (uf), the less high end it will scrub off as the tone control is turned down.
So if you reckon your guitar sounds too muddy and it is fitted with a 0.047uf cap, try fitting, for example, a 0.022uf or smaller cap instead. A lower value cap will also make more of the pot’s range useful.
For reference, vintage Fenders had 0.1uf caps – very dark sounding and virtually unusable throughout most of the range of the pot. Also, for reference, 0.047 microfarads = 47,000 picofarads.