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1979 Marshall JMP 2203 Jam

34 Comments
  • avatar
    lapata19
    Posted at 00:16h, 19 May

    I don’t know where to comment this, but here seems an appropriate place. I`ve been struggling with this decision for some time now, and the question is, 2203 or 1959?
    See, I don`t the money (now) to buy both and probably this is going to be my main gigging head for some time. With were you what would you get, 2203 or 1959?
    Please help me

    • avatar
      lapata19
      Posted at 01:28h, 19 May

      I don’t know exactly where to comment this, but here seems an appropriate place. I`ve been struggling with this decision for some time now, and the question is, 2203 or 1959?
      See, I don`t have the money (now) to buy both and probably this is going to be my main gigging head for some time. If were you what would you get, 2203 or 1959?
      Please help me

      Sorry still some trouble with English

      • avatar
        AngusRudd1019
        Posted at 07:06h, 19 May

        1959 is brighter than a 2203. 2203 has a bit more growl in my mind. I don’t have an original vintage 1959 but I have the reissue 1959SLP and a vintage ’79 Marshall 2203 and the 2203 has more growl to it. Really depends on taste. You want a more heavier sound, 2203 but if you want a brighter and crisper sound, 1959

        • avatar
          Ryley
          Posted at 07:27h, 19 May

          i have actually never had the opportunity to play a 1959… vintage or reissue so i can’t say from experience, BUT i’ve heard both amps extensively and i completely agree here^^^^ just a matter of taste

        • avatar
          lapata19
          Posted at 23:16h, 19 May

          that really helps, thanx. My main struggle is that I tend to like more the 2203 (because of its growl). But whenever I hear a good solo throw a 1959, I go down, especially in live situations. But thanx, peoples opinion helps me clarify my thinking

    • avatar
      KyleSG
      Posted at 07:55h, 19 May

      Well 1959 or 2203 well I have a 79/2203 and haven’t played a 59 but only a 1987 but pretty much the same amp as ones 50watts and one 100watts and Personally I would always pick my 2203 or a 2204 and the main reason is because they are master volumes and even though I do have an attenuator you can still play the amp in a bedroom size room with one with it and with the 59/87 not having the master volume you need for sure an attenuator or a huge place to play it and if you play in a band the 1959 is way to loud for the average bar scene. I personally think the 2203/2204 is much more versatile as you can get cleans easy or crunch for hard rock and metal both at low volumes if you want but a 1959/87 you have to really crank to get them to crunch and then it can be ear blowing if not in the right place lol.

      • avatar
        lapata19
        Posted at 23:21h, 19 May

        That’s actually very helpful.
        One question, my cabinet is loaded with g12-65
        Do you think that a 2203 is going to sound as it should throw that?

        • avatar
          KyleSG
          Posted at 23:43h, 19 May

          Any good marshall amp will sound good through a good 65 speaker cab even a 2203 🙂

  • avatar
    lautmaschine
    Posted at 03:56h, 16 March

    Nice video – great sound.

    All of these videos with JMP 2203s made me jealous, so I spent the afternoon to convert my ’68-69 spec 1987 into a 2204. VERY different sounding from the 1987 – I mean the basic Marshall sound is there underneath, yes, but the upper-midrange is much more prominent. It is also much more pick sensitive, especially in the upper registers. Instant Powerage tone! I will have to play around with it more this weekend before deciding whether I like it better than he 1987.

    • avatar
      Ryley
      Posted at 05:31h, 16 March

      Thats awesome man, how did everything turn out? was it difficult? – this amp covers most of those “prime” AC/DC years, and is incredibly versatile in its own right. also by far the LOUDEST amp i’ve ever played LOL

      Thanks for your feedback dude 🙂

      • avatar
        lautmaschine
        Posted at 18:33h, 16 March

        Not a difficult mod. Minor changes in wiring and a couple of components in the first stage of the amp, and you’re done. There is a layout out there to make a 2 in 1 amp, where you can switch between a 1987 / 2204. Completely reversible mod. I just might do that but need some more parts.

        • avatar
          Ryley
          Posted at 19:44h, 16 March

          sounds really cool man 🙂

  • avatar
    Soloepi
    Posted at 14:03h, 15 March

    Instant Ang! Great rig, and great playing, Ryley!

    • avatar
      Ryley
      Posted at 05:32h, 16 March

      Thank you! will never get rid of this thing haha!

  • avatar
    Stevier
    Posted at 18:38h, 02 March

    Sounds great man!

  • avatar
    KyleSG
    Posted at 17:58h, 24 February

    Great Job just curious what brand you have for tubes in there?

    • avatar
      Ryley
      Posted at 21:44h, 25 February

      Thanks, they’re JJ’s 🙂

      • avatar
        KyleSG
        Posted at 21:13h, 26 February

        Ok awesome I have the same amp with tung-sol tubes in it but yeah yours sounds great as well!

        • avatar
          Ryley
          Posted at 01:15h, 27 February

          Thanks man! unfortunately it doesn’t sound as good as it could. Just cracked her open with my tech and we noticed a brightness capacitor has been literally clipped out for some reason, and the 5W resistor for one of the power tubes is completely fried, meaning it is not resisting anything and is affecting the sound. Not an expensive fix, but it is something that needs to be fixed!

          • avatar
            Dries
            Posted at 07:58h, 27 February

            The 5W screen resistors on top of the power tube sockets are not there for ‘sound’. Their main function is to limit the voltage on the screens, which protects the tubes. The resistor ensures that the screen voltage stays below the plate voltage. Without it, the screen voltage may rise above the plate, causing the the screen to draw a lot current. It may shorten the tubes life. Amps even sound better without them, but on current production tubes, they are necessary.

            • avatar
              Ryley
              Posted at 10:05h, 27 February

              Yes this is very true, and seeing as how expensive tubes are, i want to get the most life out of them as i can 😛 i just wanna get this old beast back up to snuff. The guy whom i got the amp from fried a tube bc he put it in wrong basically, and this is what i believe fried that resistor. thanks for the input man, much appreciated!

              • avatar
                Dries
                Posted at 14:22h, 27 February

                No problem ! If you have any other question, ask !

                • avatar
                  Ryley
                  Posted at 03:38h, 28 February

                  I actually do have a question man, it has to do with the impedance selector on the amp. Mine came without the selector cap. So i ordered a replacement one, and it fits perfectly but the selector WILL NOT TURN. I have no idea what impedance it’s stuck on…

                  • avatar
                    KyleSG
                    Posted at 06:39h, 28 February

                    What cap? Yours is one that turns eh my 79 jmp has the pull out 2 prong one you stick in and take out and rotate to different holes for selection but my brothers 81 jmp canadian model has one that just turns by hand with say a flat screw driver which is handy as nothing comes apart so you don’t lose the piece that comes out.

                    • avatar
                      Dries
                      Posted at 07:57h, 28 February

                      Yes indeed, the original plug system doesn’t rotate. The holes nicely align for each impedance if you pull out the plug and insert it differently. But they are a bit dangerous imo.. Maybe hardwire them on 16omhs in the amp if you’re going halfstack.

                    • avatar
                      Ryley
                      Posted at 17:27h, 28 February

                      AH! see that makes so much more sense… but because the amp has been SLIGHTLY altered already, and i didn’t have the impedance selector piece, i’m thinking someone already hardwired it, but i have no idea what they hardwired it to. definitely 8 or 16 ohms, but i really have no idea. if it is hardwired already, i don’t exactly want to go plugging and unplugging the pronged selector incase something happens lol

  • avatar
    Johnny
    Posted at 14:57h, 24 February

    settings??

    • avatar
      Ryley
      Posted at 21:45h, 25 February

      settings were P-0 B-6 M-4 T-6, the master was on 5 and preamp was at 7

      • avatar
        Ant
        Posted at 23:03h, 25 February

        Master on 5! Was it loud? Lol

        Groovy tone Ryley!

        • avatar
          Ryley
          Posted at 16:50h, 26 February

          LOL it was ridiculously loud, Ant xD Thank God I had headphones on…

          • avatar
            Ant
            Posted at 10:05h, 27 February

            what mic did you use to capture the sound?

            • avatar
              Ryley
              Posted at 16:56h, 27 February

              This was with 1 Shure SM57!

  • avatar
    Ryley
    Posted at 14:49h, 24 February

    Finally joined the rest of this community and picked up this ’79 jmp 2203 and man… as Fil said a couple years ago, this is THE AMP. Will never get rid of this thing!

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