Marshall JMP 2204-Non-cascade, The Let there Be Rock Tone

Discussion in 'Marshall Amps' started by sellen, Jun 2, 2019.

  1. sellen

    sellen Active Member

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    This Guy stats he found the tone, cool video


    Kinda make sense. The raw guitar tone on LTBR i'v never heard on anything else, not even AC-DC. And the reason is the amp, AC-DC went back to Super-lead and JTM after this. According to an Interview. The guy in the Video refer to this

    From Wikipedia
    In late 1975, Marshall introduced the "Master Volume" ("MV") series with the 100W 2203, followed in 1976 by the 50W 2204. This was an attempt to control the volume level of the amplifiers whilst maintaining the overdriven distortion tones that had become synonymous with the Marshall brand. To do this, Marshall designers connected the two input stages in series rather than parallel on the 2203, but not initially on the 2204, and modified the gain stage circuitry to preserve the tonal characteristics of the 'cranked Plexi' sound and converted the now obsolete second channel volume control to a Master Volume by wiring it between the preamp and EQ circuit. The 2204 followed suit in early 1977 and changed its preamp circuit to match the (then) more popular 2203.
     
    Last edited: Jun 2, 2019
  2. BanditPanda

    BanditPanda Well-Known Member

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    Thanks Sellen! Watched all 23:18 of it.
    BP
     
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  3. ampmadscientist

    ampmadscientist Well-Known Member

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    The difference is that:
    in a plexi, the preamp is clean. This clean preamp overdrives the output tubes. (therefore, much louder to get a good tone happening)
    In a 2203, the preamp has distortion.

    So you are looking at the difference between preamp clean - and preamp distortion.
     
  4. plexilespaul

    plexilespaul Well-Known Member

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    where is the walk behind the talk?
     
  5. BanditPanda

    BanditPanda Well-Known Member

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    He informed us that You Tube removed it for copyright infringement.
    BP
     
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  6. Chris-in-LA

    Chris-in-LA Well-Known Member

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    Right, but isn’t a non-cascaded 2204 very similar to a 1987 model Plexi?
     
  7. ampmadscientist

    ampmadscientist Well-Known Member

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    isn’t a non-cascaded 2204 very similar to a 1987 model Plexi?

    Yes
     
  8. ampmadscientist

    ampmadscientist Well-Known Member

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    Infringement again is it?
     
  9. Gunner64

    Gunner64 Well-Known Member Premium Member

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    Ac/dc= turn down the distortion..turn up the volume...imo almost every Marshall who's lineage derived from the jtm/plexi can get these ac/dc tones. Guitar tone of Ac/dc until Highway to Hell is cleaner than I hear 95% of the people trying to achieve it play with..."I can't get an Ac/dc tone"..ahh turn off the Rat dude ..
     
  10. custom53

    custom53 Well-Known Member

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    I had a 1977 JMP 2204 but sold it. I still have a 1980 JMP 2203 though.. Awesome Amp..!
    Marshall Full Stack 2204.jpg
    JMP and LP Standard.jpg
     
  11. BanditPanda

    BanditPanda Well-Known Member

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    in·fringe·ment
    /inˈfrinjmənt/

    Learn to pronounce

    noun
    noun: infringement; plural noun: infringements
    1.
    the action of breaking the terms of a law, agreement, etc.; violation.
    "copyright infringement"
     
  12. sellen

    sellen Active Member

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    Very True. But the tone on LTBR got rawer than before. Angus guitar that kicks in after a while on the intro to overdose is as mean as it gets. Sounds almost like a broken speaker. On Powerage right after LTBR they had found their perfect sound,but never to be quit like that again
     
  13. fifteenohms

    fifteenohms Well-Known Member

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    Without a Shaffer-Vega wireless? Not really.

    That kind of clipping is going on inside the compressor-chip thingy.

    Try a Solodallas pedal on the cheapest solid-state amp in your parts pile first before challenging me on this.
     
  14. sellen

    sellen Active Member

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    ^
    The Schaffer was not used on Let there Be rock. First used on the tour for this album
    The interesting thing with all this is- Did Marshall's "mistake" with 2204(non-Cascade thing) the first year of Production(1976and early'77), make the sound of the The Great Let There Be Rock Album.
    Can't be many 2204 in original stand from'76 early'77. Could be a Cool limited Edition reissue Marshall, i buy it in a heartbeat :)
     
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  15. Shanger

    Shanger New Member

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    This might be a dumb question, but, is it possible to take a stock jcm 800 2204, and then mod it so that it is NON- cascaded then ?
     
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  16. Gunner64

    Gunner64 Well-Known Member Premium Member

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    1_ec5ccf41-775d-4f57-a02c-1169bdcfd01a_1024x1024.jpg I would think so as they made a factory one..
     
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  17. 79 2203

    79 2203 Active Member

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    I've tried the SoloDallas pedal and it's no different than a million other boost/OD pedals into a crunchy Marshall. On the day I thought my Barber LTD SR did that job heaps better but thats subjective. But regardless of what pedal I preferred, the sound of SG straight into my vintage 2203's was heaps closer to ACDC than boosted with any pedal.

    In any case, Malcolm is just as much the ACDC sound and he was always straight in. Whatever the Scheaffer added, it was pretty subtle.
     
  18. 79 2203

    79 2203 Active Member

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    My guesses for why LTBR sounds so different is that they were using their previous equipment and the producers were going for a more raw, aggressive guitar tone to suit the more raw, aggressive songs compared to previous albums. Maybe inspired by the emerging Punk movement.

    The other is that they made the typical Newb mistake with 2203's and cranked the Master, and then kept the Preamp low to mimic a Plexi, but without realising the brightcap is on the Preamp on 2203's and the lower the setting, the brighter the amp. If the amps were new, then maybe their speaker cabs were new too. A 2203 with the Preamp low, into a quad of non broken in Blackbacks is going to be really bright.

    But I'd go with option 1
     
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  19. Exojam

    Exojam Well-Known Member

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    Interesting since the Solodallas I have acts nothing like any of pedal I have or have had. Although my pedal list is probably a hell of a lot shorter than yours.
     
  20. 79 2203

    79 2203 Active Member

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    I'd be interested to read what you think makes it different ?? Wasnt it designed to mimic the boost that Angus's wireless system gave his signal by adding a slight bit of sizzle and compression ??
    I've only owned about 20 OD pedals in 35+ years, though I owned 10+ boutiques in recent years.
     
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