JCM 800 2203x or SC20

Discussion in 'Marshall Amps' started by Frehley12, May 25, 2020.

  1. Frehley12

    Frehley12 Member

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    I have an itch for a JCM 800. Local sale for a used 2203x for $1200 excellent condition. I don't play out. I have been focused on the SC20 head until this 2203x popped up for sale. I would be running either through my SJ 4x12 with v30s.

    I also have an empty SJ 2555X head shell. Would a 2203x chassis fit a 2555x head shell box?
     
    Mitchell Pearrow and 67mike like this.
  2. 67mike

    67mike Well-Known Member

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    I would buy that 2203x and yes...will fit into the 2555x shell
     
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  3. Lance Chambers

    Lance Chambers Well-Known Member

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    You should buy the SC20 for home use, so I can buy the 2203X for home use. :fever:
     
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  4. marshallmellowed

    marshallmellowed Well-Known Member

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    It depends on if you're buying for what you "want", or what you "need". That's a good price or a 2203x, but unless you're playing outdoors, with no PA, it would be overkill (IMO). The master volume needs to be at around 2.5-3 for the amp to sound it's best, and that's very loud indoors.
     
  5. LPMarshall hack

    LPMarshall hack Well-Known Member

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    I say get the 2203x. It’ll have a ton more girth than the SC. Although I imagine the SC would sound pretty beefy thru a 4x12.

    I’m no help.
     
  6. Frehley12

    Frehley12 Member

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    What's the volume taper on the SC20?
     
  7. marshallmellowed

    marshallmellowed Well-Known Member

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    It's the same as the 2203x, the amp starts to come alive at around 2.5-3.
     
  8. Frehley12

    Frehley12 Member

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    So on 2 the SC is LOUD as F@@k? Does one have a "better" loop than the other?
     
  9. 67mike

    67mike Well-Known Member

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    The real 2203 will eat and crap out the mini one for breakfast.
     
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  10. houseofrock

    houseofrock Well-Known Member

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    2203x
    but what do I know I have 2 superbasses for home use.
     
  11. JBA

    JBA Well-Known Member

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    2203 unless weight is an issue for you; that is the only “unless” I can think of ;-)
     
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  12. Filipe Soares

    Filipe Soares Well-Known Member

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    2203 and an attenuator.
     
  13. marshallmellowed

    marshallmellowed Well-Known Member

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    I'm guessing you haven't played through both a SC20 or 2203x on 2? The SC20 on 2 is not loud, compared to a 2203x on 2.
     
  14. Frehley12

    Frehley12 Member

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    I played on a used 2203x many years ago at a GC and don't remember where the volume was set. Just low enough not to piss off the employees. I should have bought it as it was THAT sound I so crave.

    I have played on a SC20 for literally a minute or 2 back in December. The settings on it sounded great as soon as I plugged in and turned it on. Don't remember where the volume was set. It wasn't loud.

    So where on the SC20's volume compares to 2 on the 2203x?
     
  15. Frehley12

    Frehley12 Member

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    I received the following on the 2203x after contacting the seller:

    "The only two things were done with the amp. I replaced all the filter capacitors with new F&T capacitors. Also, these amps come equipped with two board mounted potentiometers. One is for adjusting the bias, and the other is for adjusting PT hum. The original pots was professionally replaced with a single resistor. This is common practice for the 2203X as those pots usually fail. There is tons of data about this issue on the net. Check it out. The rest of the amp is totally original. The F&T caps are of way better quality then the crappy Chinese ones Marshall put in there. Do a bit of research on the caps as well. F&Ts are the best available today. All the boutique amp makers use them."

    How does that sound to you guys? I understand the filter cap job but the pots on bias and PT hum I'm not familiar with. Hot air or a good thing?
     
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  16. marshallmellowed

    marshallmellowed Well-Known Member

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    I've read of some issues with hum balance pots, but never had any issues with my amps. I've never had an issue with a bias pot, and prefer it for ease of biasing. Nothing wrong with a fixed resistor, just requires more effort to bias.
     
  17. Trelwheen

    Trelwheen Well-Known Member

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    Can you play loud at home? Do you like loud?

    If so, get the 2203.

    If not, get the 2203 anyway.
    :headbanger:
     
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  18. Solid State

    Solid State Well-Known Member

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    I'd get the 2203X for 1200 and here's why. That's as low as that price will ever go and you'll always be able to get your money back if you ever need to.
     
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  19. coolidge56

    coolidge56 Well-Known Member

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    Sounds like a Marshall 'humdinger pot' there have been some spectacular failures on the Marshall Astoria, here's one. A resistor will be fine but you should ask about hum because the humdinger is the bandaid fix for hum and that's gone now.

    burned01.jpg

    As for the bias pot I don't like that they replaced the pot with a fixed resistor that's going to be a pain when swapping tubes. And how many times can you solder different resistors there before the PCB solder pads give out. Better to install a quality bias pot.

    See this pot, that's a 25k PEC locking pot. Only requires a 1/4 inch hole. I use these for bias pots and stick them out the top of the chassis so I don't have to pull the chassis from the head shell to bias. Loosen the nut, bias the tubes, tighten the nut to lock the pot.

    biaspot.jpg
     

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  20. EADGBE

    EADGBE Well-Known Member

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    I have a 2203X and it's very loud. But it does have a nice pure tone. And that's a good price for a used one.
     
    junk notes likes this.

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