Replaced by Attenuator spreadsheet.
Updated with Impedance Matching.
This is a Pi Attenuator calculator with power dissipation.
The main purpose is to give correct impedance at both the input and output and give you the minimal power rating for the resistors.
I have not included impedance matching as this one gave me enough of a headache to calculate.
To actually build one that can handle the output of a guitar amp is an engineering feat in my opinion.
Enjoy while I get some aspirin.
Mike
Pi Attenuator Ver2 (obsolete)
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