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Title: Marshall JMP1 EQ
Post by: MetalGuy on November 03, 2005, 06:03:47 AM

Hi,

Do you know what are the center frequencies of Marshall's JMP1 EQ and what are the values of the digital pots?
Thanks in advance!

Title: Re: Marshall JMP1 EQ
Post by: Arno van der Heijden on November 03, 2005, 06:51:54 AM

Here's the schematic:

http://www.drtube.com/schematics/marshall/jmp1-61-04.pdf

Title: Re: Marshall JMP1 EQ
Post by: MetalGuy on November 03, 2005, 04:19:16 PM

I have the schematic, thanks. I dont' know how to calculate the filters' frequencies.
Especially the Presence section. Your help will be appreciated.

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