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

Add a channel to parametric equalizer Rod Elliott Project 150
Add a channel to parametric equalizer Rod Elliott Project 150
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Old 27th March 2020, 05:57 AM   #1
wonderfulaudio is offline wonderfulaudio
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Default Add a band to parametric equalizer Rod Elliott Project 150

Rod Elliott's project 150 shows schematic for a single band parametric equaliser.
Parametric EQ

Click the image to open in full size.


How does one add another band to it?

Thanks,
WA

Last edited by wonderfulaudio; 29th March 2020 at 04:53 AM.
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Old 28th March 2020, 02:15 AM   #2
PRR is offline PRR  United States
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Add a channel to parametric equalizer Rod Elliott Project 150
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File Type: gif p150-f3-x3-42.gif (6.1 KB, 87 views)
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Old 28th March 2020, 12:58 PM   #3
Mark Tillotson is offline Mark Tillotson
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And you'll need a 2-gang pot for the cut/boost VR2, and a 4-gang pot for the frequency VR1.


Alternatively you could replace the piggy-backed 10k linear pot for the frequency with
a single 10k log per channel, thus only needing a dual log 10k pot for frequency for two channels.
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Old 29th March 2020, 04:39 AM   #4
PRR is offline PRR  United States
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Add a channel to parametric equalizer Rod Elliott Project 150
> a 4-gang pot for the frequency

I would call that a single channel with double-strong action.

I thought he wanted a bass +and+ a treble.

I agree the question can be read several ways.
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Old 29th March 2020, 04:53 AM   #5
wonderfulaudio is offline wonderfulaudio
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I replaced the 'channel' with 'band' in the original question.

Thank you all for your responses

Last edited by wonderfulaudio; 29th March 2020 at 04:56 AM.
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Old 5th April 2020, 12:18 AM   #6
dotneck335 is offline dotneck335  United States
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You could use this:
Eight Band Sub-Woofer Equaliser
and just adapt it for wider-band use.
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