1933 cab plans

Discussion in 'Cabinets & Speakers' started by AndyD, Mar 8, 2021.

  1. AndyD

    AndyD Well-Known Member

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    Considering making a 1x12 cab and wondered if anyone could share some cab plans for a 1933 cab? Or some dimensions will be very helpful. Thank you.
     
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  2. junk notes

    junk notes Well-Known Member

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    What are you looking for exactly?
     
  3. Adieu

    Adieu Well-Known Member

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    It seems to use an off-centre speaker and a porthole
     
  4. Dogs of Doom

    Dogs of Doom Moderator Staff Member

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  5. pedecamp

    pedecamp Well-Known Member

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    I built a 1912 sized cab, 19 3/4" x 17 1/4" x 12", with a couple 2" port holes in opposite corners in the front.

    [​IMG]

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    Last edited: Mar 8, 2021
  6. fitz288

    fitz288 Apprentice Fermi's Paradox Analyst Silver Supporting Member

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  7. AndyD

    AndyD Well-Known Member

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    That’s exactly the setup I am looking to achieve. Those small head cabs are awesome!
     
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  8. AndyD

    AndyD Well-Known Member

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  9. pedecamp

    pedecamp Well-Known Member

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    Looking at that 1933 looks to be made for a 26" wide head like a 50 watt JMP, looks about 26x20, bigger box might give more depth in tone. Whatever you make use good ply with lots of layers, baltic birch is good 13 layers (checked cab), sometimes can find hardwood ply 9 layer at home depot works good too (black cab). Both sound good! :yesway:

    [​IMG]
     
    Last edited: Mar 8, 2021
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  10. Geeze

    Geeze Well-Known Member

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    I don't think there is a 'best' cab size for any speaker configuration. I copied one of Zilla's 1x12 the Fat Baby and really like it with an EVM12L. I read a thread on that other guitar forum that won't be named they - Zilla - engineered their cab sizes for some resonance value and I have to say I like the Fat Baby better than the TL-806 cabs designed for the EVM12L.

    Russ
     
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  11. AndyD

    AndyD Well-Known Member

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    Are there any 1933 cab owners that are willing to post the dimensions of the cab, please?
     
  12. FracStrat

    FracStrat Well-Known Member Gold Supporting Member

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  13. pedecamp

    pedecamp Well-Known Member

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    Find 1933 cabs for sale and ask a few sellers for the dimensions, if they all give you the same dimension then you know its accurate. I'm gonna guess 26 x 20 x 12
     
  14. AndyD

    AndyD Well-Known Member

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    I could do.....! So far I have found the following quotes.
    23” x 9 7/8” x 19”
    22.75” x 9.5” x 18.75”
    22.25” x 9.5” x 16 1/8”
    The last one seems too different from the other two.
    It seems that a cover for a 4010 measures 23” x 9.75” x 19” so I’m going to go with the first measurement!
     
    Last edited: Mar 9, 2021
  15. Dogs of Doom

    Dogs of Doom Moderator Staff Member

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    I'd imagine that it would be ¼" smaller than the cover, to allow it to slip on/off. ¼" is 1/8" all around.

    Also keep in mind those inner measurements, on that other thread. Figure, the inner measurements & add 5/8" x's 2 = 10/8" for the baltic birch plywood, & you should be in the ballpark. Add another ½" to 3/4" for the front baffle stop.

    But, anyway, you're in the UK, so, you need the metric measurements. In US, I'd be willing to say that:

    22.75 x 9.5 x 18.75 is the hot ticket...

    In UK, the numbers are round, so, whatever the nearest 5-10 is. Meaning, they typically do not run w/ numbers like 272cm, it would either be 270, or 275. So, if say, 18.75" equals an odd metric number, you'll be guessing nearest number, rather than going by US standards, since Marshall starts w/ British measurements, not US...

    although, typically, measurements go width x height x depth, whereas it seems a lot of people put them out of order.

    22.75 x 18.75 x 9.5 (w/h/d)
     
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  16. pedecamp

    pedecamp Well-Known Member

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    I think youre right, a 1933 is probably an extension cab for a combo amp like you said, the measurements for a 4010 would probably be it! :yesway:
     
    Last edited: Mar 9, 2021
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  17. Dogs of Doom

    Dogs of Doom Moderator Staff Member

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    just a note, on this (green). The taller measurements are for the amp. The amp adds 2" +/- for the chassis/controls, so the shorter one would probably be for the extension cab. The cover, being for the amp, confirms that...
     
  18. AndyD

    AndyD Well-Known Member

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    Update! I’ve bought a 1933 cab! Should get it next week. Will post photos when I get it.
     
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  19. junk notes

    junk notes Well-Known Member

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  20. AndyD

    AndyD Well-Known Member

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    [​IMG]
    So, as stated a little earlier, I went ahead and bought a 1933 cab which arrived yesterday. The amp on top is a 1979 JMP 2204 in a small head shell that I made for it. I am very pleased with the combination. The cab has a very nice bass response for its size. It came with a G12M-70 which sounds pretty good. I’m going to try it out with a G12-65 and a pulsonic G12H-30 75hz to see what sounds best.
    The dimensions! They are 22 7/8” x 18 3/4” x 9 1/2” with a 2 1/2” port! We were very close indeed with the guesswork. Thanks again to all who contributed.
     
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