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Thread: JCM800 vs JCM900

  1. #1
    Forum Member Don's Avatar
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    JCM800 vs JCM900

    Two weeks ago I picked up a beat and broken 1990 Marshall JCM900 2501 50 Watt High Gain Master Volume MKIII 1x12" combo. I finally received all the parts the other day and finished repairing it today. I compared it to my 1982 JCM800 4010 50 Watt Master Volume 1x12" combo.

    The JCM900 is a cool amp, but the JCM800 is an awesome amp! The JCM800 has a very organic dirty tone, like a roaring lion or a car with open headers. The JCM900 is smoother sounding and gets even dirtier. The JCM900 never sounds quite as good as the JCM800, except that it can function at lower volume levels. Either way, both of these amps are dinosaurs- relics of a bygone era.



  2. #2
    ZoneFiend photoweborama's Avatar
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    Re: JCM800 vs JCM900

    I was told by a mentor that the JCM800 was the way to go!
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  3. #3
    Forum Member Don's Avatar
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    Re: JCM800 vs JCM900

    Quote Originally Posted by photoweborama View Post
    I was told by a mentor that the JCM800 was the way to go!
    This JCM800 is pretty awesome- an early amp with a browner sound than the later amps due to its lower plate voltage (they changed the power transformer later in the year which increaded the plate voltage by about 100v), though "JCM800" was a line of many amps- heads, combos, multiple wattages (15-100?), single channel, multi-channel, channel switching, all tube, solid state, hybrid, even bass amps! "JCM900" was a line of several amps as well.
    Last edited by Don; 03-29-2023 at 07:16 PM.

  4. #4
    Forum Member ch willie's Avatar
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    Re: JCM800 vs JCM900

    Those are fantastic amps. I keep trying to convince myself that I don’t miss my Marshall…
    If we'd known we were going to be the Beatles, we'd have tried harder.--George Harrison

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