Quote:If your input impedence is 47k, you can go much lower.
Yes, 47k is standard for many/most S/S pre-amplifier inputs and 10k for many power amplifier inputs and/or valve circuits.
2.2uF will be fine into following 47k load and well worth experimenting using the calculators for lower.
https://www.redcrab-software.com/en/Calc...ass-filter
https://www.learningaboutelectronics.com...hp#answer1
----------
bob
bob