JCM800 Superbass

Discussion in 'Marshall Amps' started by ClayBass, Jan 16, 2020.

  1. ClayBass

    ClayBass New Member

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    Hi,

    Question about the JCM800 Bass Series (made in '87) 2 horizontal input model amp. if I'm plugged into one can I use the 2nd input to send that signal to the input of another amp like you can with an older 4 input JMP amp? Thanks.
     
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  2. ampmadscientist

    ampmadscientist Well-Known Member

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    no
     
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  3. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    :squint:
    Why yes, yes you can. :)
    That INPUT is or should be no different than one of the old four holer INPUTS of a JMP.
    Which model JCM800 bass amplifier are we talking about?
     
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  4. ampmadscientist

    ampmadscientist Well-Known Member

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    "2 horizontal input model amp."
    If you plug into low jack, the switch breaks the audio path of the high input.
    So it's not like the jacks on a plexi, etc.
     
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  5. ClayBass

    ClayBass New Member

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    Thanks.
     
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  6. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    So a SuperBass is a model 1992 and the one in question is a JCM800 series. How exactly does the jack break the audio path?
    As I said before it is practically the same as the jacks on a plexi style.


    upload_2020-1-17_23-26-7.png
     
  7. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    Who are you thanking and why?
     
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  8. scozz

    scozz Well-Known Member

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    This is what I’ve always thought,....
     
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  9. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    See post #6.
     
  10. ClayBass

    ClayBass New Member

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    I don't remember LOL. The JCM800 quit saturday night anyways. It sounded like a blown speaker for a few minutes ( or like digital distortion kind of sound on the lower notes) and then nothing. The light on switch is still on and fuses are ok so I guess moot point till it's looked at Thursday by a tech. The goal was connect the JCM to the JMP using low gain jack on JCM with a few always on pedals in between the two. In the never ending search of a sound...
     
  11. South Park

    South Park Well-Known Member

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    The 2204 has a cascade circuit the high input goes to the first triode lots of gain the out put then goes to gain pot then goes to the low Jack it has a switch contact to connect to second triode lower gain .
     

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