Marshall 5210 MODs?


New Member
Jun 9, 2013
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I just purchased a SS, Marshall 5210 because of the tube shortage, because I don’t want to put a lot of hours on my Marshall JTM 45’s
So I was wondering if you guys knew of any mods to smooth out the overdrive in these Marshall 5210’s i’m not looking for more gain if that helps in fact I like that clean dirt kind of sound. I’m not sure if 5210’s use clipping diodes or op amp distortion, not sure? And the only schematics I can find are extremely fuzzy and hard to read. So any help with smoothing out the distortion channel would be greatly appreciated. Also if anybody knows which capacitors are the tone stack capacitors in the later 5210’s, i’d like to change out the capacitors for better ones. Thanks again for any help💯


Well-Known Member
Nov 8, 2021
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You cant do anything but turn it
louder and use less preamp.

No, it wont get any better if you stomp on
that SD-1. Worse.

No straight forward mod will change this!

I had all the 80s transistor Marshalls at the
same time that i had the real amps.

The buzz fuzz comes from the semiconductors

The baseproblem is your dialing in way
too much preamp at too low mastervolume.
Tube or Transistor amp doesnt mather, but
with the transistors its way worse.

A lot of guys will step up and say
this is BS, but it aint. The ear doesnt like
it when you try to fool it with cascaded

People who tell different have tired ears.

Just try it, put your JTM45 Volume on 5.

Yes loud.

Now turn the Master on your 5210 FULL up.
Then adjust preamp until its about as loud
as your JTM.

Doesnt sound shitty anymore all off a sudden,
Last edited:


Well-Known Member
Platinum Supporting Member
Jan 22, 2020
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Water Side of WA State
IMHO, If you really want to get a bit more Marshally tone out of a 5210, here are a few things I did to mine.. I was happy with the results.. YMMV

Closed Back,
EQ in the EFX Loop
Well broken-in Speaker with a bit less High-End in character

added benefit of being reversible changes

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