How to calculate capacitor values for fully parametric EQ? - diyAudio
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Old 19th November 2010, 07:48 PM   #1
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Join Date: Jun 2010
Default How to calculate capacitor values for fully parametric EQ?

hey all-

I came across this design for a fully parametric EQ that I will use for the mixer on this site: Simple, Easy Parametric and Graphic EQ's, Plus Peaks and Notches

The only thing I can't seem to figure out is what are the capacitor values I should use for my frequency bands? I have an idea in mind as to the frequency values (five band EQ):

Band 1: 50 Hz-225 Hz
Band 2: 200 Hz-900 Hz
Band 3: 800 Hz-3.6 K
Band 4: 2K-9K
Band 5: 4.2K-19K
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Old 20th November 2010, 11:57 AM   #2
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
the third diagram down "a simple graphic EQ" has the formula alongside.

Further down he takes you through a worked example.
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regards Andrew T.
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Old 20th November 2010, 09:03 PM   #3
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So I calculate the capacitor values using proportions?
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