Getting the JCM800 to cut

Discussion in 'Discussion' started by cragginshred, Jul 9, 2018.

  1. cragginshred

    cragginshred Well-Known Member

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    I like the JCM 800 and Plexi a lot. Both need some coaxing to cut in the mix. The Plexi was easier to get good mids than the 800 which seems odd because a real JCM 800 can actually be harsh.

    I like the matched cabs best too, keep the IR rabbit hole to a minimal!
     
  2. Bryan

    Bryan Active Member

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    Maybe but a TS in front of it?
     
  3. cragginshred

    cragginshred Well-Known Member

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    Did that
    Seems like it has more to do ya it’s where to get in the bass wiper getting too thin
     
  4. paulfrench

    paulfrench Well-Known Member

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    What are your settings in the amp block of the jcm800?
     
  5. cragginshred

    cragginshred Well-Known Member

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    Bass at noon -should be less but it gets thin. Treb 10 Mids 9 Pres noon
    TS in front and matched cab.
     
  6. paulfrench

    paulfrench Well-Known Member

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    Yes, a jcm800 full stack can definitely rip your face off! I’ve owned and gigged with a couple dozen different jcm800s over the years, and think Atomic did a good job with this model. My settings on my master volume 50 and 100 watt Marshalls: preamp volume 10, master volume 2-3, treble 7, middle 6, bass 7, presence 7 (using the high input) That was my starting point with the Atomic.
    The presence on the real thing is a lower frequency than the treble, it’s kind of an upper mid, so I’d suggest bringing that up on yours.
    How do you have the gain, amp master, and damping set? The damping and amp master can have a big effect on how mushy the amp tone gets. 100% makes this amp pretty punchy, and so does lowering the amp master. I know you don’t want to go down the IR hole, but the cab settings can be really helpful to tone adjustments. Somebody suggested setting the Peak @ 0.7, and that seemed to help the tone for me.

    Also, make sure you have it loud enough in your mix. If it’s low in the mix, and if the overall mix is quiet it gets very different, and wimpy. Turn that shit up! It’s easy to forget how loud these tube amps are in the real world.

    Another thought might be to try the Kornfield model. It sounds great, and cuts like crazy.
     
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  7. Jr.Deluxe

    Jr.Deluxe Well-Known Member

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    Try cutting frequencies of other things in the mix to make room for the guitar. If it's guitar based rock music, it's better to have the guitar sound fat at the expense of thinning other things like bass or keys.
     
    Ken Hill and cragginshred like this.

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