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Old 11th February 2009, 01:52 AM   #1
SMOTH is offline SMOTH  Canada
diyAudio Member
Join Date: Feb 2009
Default Notch EQ help?

Hello all, this is my first thread! I wasn't entirely sure where to post it, so I threw it here.

I'm building a stand alone Frankenstein spring reverb circuit, part tube, part transistor and part op amp- I'm not quite happy with the tone of the reverb and want to add a simple EQ circuit where I can actively add some more treble. Ideally, I'd like it to have 2 controls; a cut/boost dial and a frequency sweep dial. Unfortunately, I don't yet know enough to design one myself, and an hour searching the web has turned up very little.

Was wondering if anyone here had some suggestions or could direct me to a schematic that might work.

many thanks,

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Old 11th February 2009, 03:18 AM   #2
diyAudio Member
Join Date: Dec 2007
Location: Phoenix, AZ
Hello SMOTH, From what I read of your post, you want a bandpass filter, as opposed to a notch or band stop filter. An example of a bandpass filter is a Wah Pedal.
Do a google search for bandpass filter and see if that helps you out.


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Old 11th February 2009, 03:29 AM   #3
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Join Date: Oct 2007
Location: Santa Cruz, California
...or are you after a Parametric EQ which has a tunable boost/cut with adjustable Q?

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