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jmp 50watt lead mk2 1976 ?

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  • #16
    Is it a 2203 or a Non Master Volume model? Either way they are great amps , but they are painfully bright. Clipping the bright cap definitely isnt butchering the amp. Its very simple to remove and replace if you decide to. I do it on ALL of my old Marshalls.
    ----------------------------------------
    1981 Gibson Les Paul Custom- Wine Red
    1971 Gibson Les Paul Goldtop
    1995 Gibson Les Paul Classic
    2010 Fender American Tele
    2011 Fender Am. Std Strat
    1984 Marshall JCM 800 2203
    1974 Marshall JMP Superlead
    Orange Rockerverb 100 MK II
    Peavey JSX
    Peavey XXX
    Line 6 Spider IV 75 (2) for the cover band
    Orange cabs
    Beer & Whiskey

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    • #17
      cant you change the bright cap to a lower value one ??

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      • #18
        just trade it for a peavey xxx its the tone in your head!

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        • #19
          just trade it for a peavey xxx its the tone in your head!


          dude.. gross.


          I have a 2204. it's painfully bright when turned down. Turned up it's bright, but there's so much else going on you don't notice it. Crushing tone, but so much noise it's anything but useful (a seperate problem entirely)

          a friend of mine has a traynor yba-1 that I installed a PPI-MV into, and it works flawlessly. I might do the same to mine, and have a PRE-PI as well as PPI-MV.
          Most of the

          Here's video of me playing it, where I could crank it, . You can still hear the highs really coming through over everything, http://www.youtube.com/watch?v=aJoOjmYDElc&feature=related

          gets lost in the mix after the start (ignore talking haha ... )

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          • #20
            cant you change the bright cap to a lower value one ??


            That's what I plan on doing, prrrrobably tonight.

            Come to think of it - I think it's got a 47pf cap on it right now. Looking at the schematic that's not right at all!

            However, clipping it made it way too dark.
            I've got some work to do...
            maybe a rotary switch with like 5 different cap values!

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            • #21

              Come to think of it - I think it's got a 47pf cap on it right now. Looking at the schematic that's not right at all!

              Are you sure it's not 470pf? I believe that's what it should be.
              DIALED IN RIGHT






              Originally Posted by LoopQuantum


              Needed a new sig. Thanks!



              In case you're wondering, the chick in the douchebags avatar is Kari Sweets.
              See how easy that is, douchebag?







              "Two wrongs don't make a right, but three lefts do!" - Me

              Some links about biasing: what bias is and methods to measure bias
              Good info regarding impedance mismatch (thanks James Peters):http://aga.rru.com/FAQs/technical.html#imp-1

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              • #22
                Head over to http://forum.metroamp.com Post that photo of your amp's circuit and I you'll get plenty of info on how to mod your amp to sound to your liking. You can even take a look at some of the amp-build instructions they have to get an idea what every part in the amp actually does.

                You could convert your amp to partial bass/superbass spec to make it darker and tame some of that high-end. But, removing the bright cap is probably step one.
                Cameron CCV
                Diezel VH4
                Bogner 4x12
                '79 LP Silverburst
                '84 LP Silverburst
                '11 LP R9

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