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Single cap high pass passive line-level xo

The formula is C=1/2*pi*f*R so for a 20Kohm amp, C in mfd is 10^3/2*pi*350*20 or 0.022 mfd.
I chose 350 hz because looking at the native crossover, the mid HP has a -3db at 300 and since a first order xo has a softer slope I moved it up a bit.



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