...and it's also dependant on the input impedance of the amp conected to the preamp (and a cap itself).
For a 6dB per octave high pass filter:
F= 1 / 2 x Pi x R x C where
F= -3dB frequency in Hz, R=amp inp resistance in ohms
C=Capacitance in Farads, Pi=3.1415926
You do the math and another mystery in DIY solved
For a 6dB per octave high pass filter:
F= 1 / 2 x Pi x R x C where
F= -3dB frequency in Hz, R=amp inp resistance in ohms
C=Capacitance in Farads, Pi=3.1415926
You do the math and another mystery in DIY solved
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