Some 80s JCM800s and JMPs With a Bogner Twist

Discussion in 'Marshall Amps' started by Eddylenz, Jan 10, 2020.

  1. Eddylenz

    Eddylenz Active Member

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    I recently got extremely lucky and bought a 1982 Marshall 2204 that was modded by Reinhold Bogner back in the 80s. It was one of the first, if not the first, Marshall he ever modded.
    Unfortunately, you could hear that, because it just didn't sound as good as his slightly later work.
    I then got to compare the amp I bought to two other Bogner modded Marshalls, that the seller owns. After a few hours of playing, I had a clear favorite.
    The amazing thing is, that he lend me the amp to study the circuit, which I did.
    As soon as I was done with that, I tried to buy that amp from him as well, but he wouldn't let it go, so I decided to put this late 80s Bogner circuit into the one I just bought.

    Fast forward a few days... Now I have the best Bogner mod that I've ever come across and couldn't be happier.

    Here's my Bogner before I rebuilt it


    Here's the Bogner that won the comparison


    and here's my 2203 that I recently modded with yet another Bogner mod


    I have some more videos in the making, where you can hear my rebuilt Bogner Marshall and the original Bogner JMP cranked in a studio.

    What do you guys think of these amps and have you ever played a Bogner modded Marshall?

    Cheers, Eddy
     

    Attached Files:

  2. Neil Skene

    Neil Skene Well-Known Member

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    They all sound good.
     
  3. pedecamp

    pedecamp Well-Known Member

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    They all sound good but different in their own right, I'd have a hard time choosing between them. :yesway:
     
  4. Eddylenz

    Eddylenz Active Member

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    Thanks!
     
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  5. Eddylenz

    Eddylenz Active Member

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    Thanks! Yeah, I'm glad I don't have to choose haha
     
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  6. Musicmaniac

    Musicmaniac Active Member

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    I'll take the winner!
     
  7. bad565ss

    bad565ss Well-Known Member

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    They all sound good to me.
     
  8. Eddylenz

    Eddylenz Active Member

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    Thanks!
     
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  9. tschrama

    tschrama Well-Known Member

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    Both do sound like a early Bogner. Nowadays he makes much more articulate amps, less muffled. What did you see inside? Radical differences? Slight differences, .. could you summarize the specs?
     
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  10. Eddylenz

    Eddylenz Active Member

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    The one that I bought did sound kinda muffled, but the JMP is easily one of the best High Gain amps I've ever played. It's way better than any of the new Bogner stuff if you're into 80s Metal.
    The circuits are also very different from the production Bogner amps. All his old High Gain mods are 4 stage non CF designs with very unique values. I've never seen anybody design a circuit the way he did back then.
     
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  11. tschrama

    tschrama Well-Known Member

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    you mean not somewhere alike the Fish preamp?
     
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  12. Eddylenz

    Eddylenz Active Member

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    Definitely more similar to the Fish and Triple Giant, but still quite different.
     
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  13. tschrama

    tschrama Well-Known Member

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    IIRC
    the triple gaint was: 1k5//25uF-100k, 3k3//47nF 330k, 3k3 330k, 1k5 25uF 100k.

    I think I can hear atleast one 330k. correct? and no 47nF cathode cap at al. but maybe a late highpass like the triple giant?
     
    Last edited: Jan 10, 2020
  14. South Park

    South Park Well-Known Member

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    The 2204 is a great platform to build on . With the right mods it can work .
     
  15. Eddylenz

    Eddylenz Active Member

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    The first cathode in the Triple Giant is 470nF. The Bogner JMP has completely different cathodes and lots of other different things.
     
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  16. Eddylenz

    Eddylenz Active Member

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    Yeah, they're really good for mods. That said, there's nothing of the Marshall preamp left in any of those Bogner mods haha.
     
  17. Mitchell Pearrow

    Mitchell Pearrow Well-Known Member

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    As my brothers before me have said they all sound great, I can’t pick a favorite.
    Nice score and congratulations on your new amp, an mods to get it where you want it ..
    Cheers
    Mitch
     
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  18. Eddylenz

    Eddylenz Active Member

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    Thanks, Mitch!
     
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  19. Mitchell Pearrow

    Mitchell Pearrow Well-Known Member

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    You’re welcome, and I subscribed to your Utube channel
     
  20. Eddylenz

    Eddylenz Active Member

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    Thank you! More Bogner content coming soon haha
     
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