Variation between different Marshall heads

Discussion in 'Amp Central Station' started by Antigua Tele, Nov 4, 2019.

  1. Whatizitman

    Whatizitman Friend of Leo's

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    Plexis and JMPs were diode rectified. ‘Nuff said.
     
  2. muchxs

    muchxs Doctor of Teleocity

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    Here is the list:

    https://schematicheaven.net/marshall.html

    It's primarily a technical site listing schematics. That's what I want. I dichotomize by circuit. That's why I like Marshalls through JCM800. Marshall gradually evolved their circuits. Nothing revolutionary, really. Who needs revolutionary? Most of us play guitars that were designed in 1949.
     
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  3. codamedia

    codamedia Friend of Leo's

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    Do you mean the 4210?
    If so, that amp came out at least 3 years after Toto's first album was recorded. (album was recorded in '77 and '78)
     
  4. codamedia

    codamedia Friend of Leo's

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    Absolutely true. I am very guilty of always assuming the most common models for the era.
    When someone says JCM 800, I automatically think of the 2203/2204 or their combo equivalents. Bad habits die hard :D
     
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  5. Dacious

    Dacious Poster Extraordinaire

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    You're right - I just checked with my Lukather-groupie friend and it was Through the Looking Glass covers album he made.

    Apparently those days he wanted something capable of tones at a dull roar....
     
  6. groove guru

    groove guru TDPRI Member

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    I've used a few Marshall amps over the years. Most of the Marshall players I liked were using modded Plexi's or JCM800 amps when I bought my JCM900 dual high gain. I was a bit disappointed in the tones that I could achieve. While it did have a nice chunky rhythm sound, I didn't care for the lead sound. But one night, I sat it with a band and the guitarist had a JCM900 dual reverb that I plugged my guitar into. It was amazing. Almost the exact same amp that I owned, but must have been set up better. Maybe biased better or had a better compliment of tubes than mine. I also owned a DSL100H for a while. It could cover a lot of ground with lots of gain on tap and a resonance dial to get some crazy metal tones. With a lot of tweaking, you can get some of the traditional vintage Marshall tones. But it was easier to get undesirable tones IMO. I recently plugged into a friends JCM800 at a benefit show to play a short set. I was blown away how great my guitar sounded through that amp. I liked it better than my own Bogner Shiva. I'm considering the JCM800 SC20H as a lighter alternative.
     
  7. T Prior

    T Prior Poster Extraordinaire

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    I owned and used a JCM 900 /2500/50 watter for a bit, it was nice amp, should have kept it. It didn't deliver as much clean gain as I would have liked, but nonetheless, I should have kept it. I would buy another should one cross my path at the right price. I think in the going price range these are fine amps.

    I modified the speakers out to 8 and 4 ohms rather than 8 and 16. The OT has the taps, it was a no brainer.
     
  8. Wally

    Wally Telefied Ad Free Member

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    and since my first Marshall was a 1979 JMP2203 MV, I don’t think of this amp of the MD 2204 50 watt MV or the combo versions when I hear ‘JCM 800’......just as I don’t think of the 2203/2204 when I hear JMP. Since the Md. 1959 Super Lead was built from the JTM era beginning in the 1960’s through the JMP era of the ‘70’s and JCM 800 period, this alone would lead one to realize that the model number is much more important than the series designation.

    +1 with muchxs as to schematics telling the story. Take the MV amps. They were the same circuits in early JCM 800 series as they were in the JMP series but underwent changes. The vertical input JCM versions of these MV amps are different from the horizontal input versions, iirc. For non-techs, the Doyle book lays out quite a bit of info.
    Marshall’s use of model numbers rather than model names perhaps makes it more difficult to keep things straight. Few bother to look at the back to see the model number.
     
  9. 63 vibroverb

    63 vibroverb Tele-Holic

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    JCM 900 MKiii - I don't know, sounds pretty f*cking good to me

     
  10. Wally

    Wally Telefied Ad Free Member

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    JCM 900 MKIII. That is an almost entirely tube amp. It does all signal processing in the tube domain but for a diode clipping distortion, correct? The JCM 900 High Gain Dual Reverb is a different animal.
     
  11. Mike_LA

    Mike_LA Tele-Afflicted

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    Well, if the OP wants all of the tones Marshall offers he NEEDS a 6100.
    Nuf said!
    30th Anniversary 6100
    Or my personal Fav the 6101 wjich is the combo.
     

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  12. 63 vibroverb

    63 vibroverb Tele-Holic

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    The circuit is mainly tube, including the gain - but it does have an additional diode clipping stage controlled by the “sensitivity” knob. This can be taken out of the signal by turning it all the way down. Similar to the Jubilee or a JCM 800 + overdrive pedal.
     
  13. tubelectron

    tubelectron Tele-Holic

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    After the JCM800 series, with the exception of some RIs, I must confess that I have poor consideration for Marshall amps... o_O

    But ti's me, OK ? :D

    My sole Marshall, a Class5 combo, bought 2nd hand like new... To say that I have a little cool Marshall at home.;)

    [​IMG]

    -tbln
     
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