Output Capacitors for Balanced Zen Line Stage

Depends on the Zin of the amp on the other side of the cap. It's the usual formula:
F=1/(2*PI*R*C)
Keep in mind that C is in Farads.
All other factors being equal, your -3dB point will be somewhat less than an octave higher than with the 10uF cap--but nothing is going to blow up if you fiddle with the value of the cap.

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