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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

How to calculate fixed gain or cut
How to calculate fixed gain or cut
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Old 5th August 2019, 08:48 PM   #1
vanofmonks is offline vanofmonks  United States
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Default How to calculate fixed gain or cut

Hi,
In figure 3 on this page Expandable Graphic Equaliser from an elliott sound graphic eq the gain/cut level for each frequency is set with 100k linear pots VR1-VRn. I would like to know if there is a formula to determine fixed resistors to replace the pot to set a specific gain or cut in db/ For example, lets say I wanted +3.3 db at 1k and -0.4 db at 8k, etc. Is there any way to calculate the values? In other words, I know the specific curve I'm looking for and would like to set it with fixed resistors.

Thanks
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Old 6th August 2019, 04:36 AM   #2
PRR is offline PRR  United States
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Location: Maine USA
There is a formula. My caveman mind says it could be a LOT!! faster to put a pot in there, turn until happy, pull the pot, and measure where it came out to.
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