Amp techs....how do you mod EQ?

[Scott_F]

Re: Amp techs....how do you mod EQ?

Theres a "bright Cap", well, at least in my '78 JMP , that should be identical in the JCM800. Just snip it. Its reversible, no harm , no foul.I did it to mine. Check and see , just google Marshall jcm800 bright cap, it has a number, so its too easy to do.

Or if it's a 500, lower it to a 250.

[Boogie Bill]

Re: Amp techs....how do you mod EQ?

One of the simplest solutions might be to use a graphic eq like a Boss GE-7 or a parametric. I had success with my old SUNN and my JCM 800 using an original MXR 10-Band eq to slightly attenuate the 2K band, taking out the edginess but leaving the "air".

(And yes, I clipped the bright cap on the JCM 800!)

Bill

[Gearjoneser]

Re: Amp techs....how do you mod EQ?

fwiw nearly every marshall ive played or owned has sounded best with the treble down at 2 or 3, the mids a bit over half and the bass on 10.

That's about where I usually set it.....with mids and gain around 6 - 7. I haven't messed with it yet, but as soon as I can, I'm going to experiment with some different capacitors, and see if I can get it dialed in just the way I want it. The 2204 is a keeper for sure.

[ArtieToo]

Re: Amp techs....how do you mod EQ?

http://www.duncanamps.com/tsc/

Download this and then play away to your heart's content.

That is so cool. Thanks for the link.

[crusty philtrum]

Re: Amp techs....how do you mod EQ?

That is so cool. Thanks for the link.

You're welcome. It is indeed a wonderful little piece of software (there's another one there somewhere too, for power supplies)