Speaker Upgrade For My Marshall Origin212A Cabinet

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Speaker Upgrade For My Marshall Origin212A Cabinet

I have a Marshall Origin20H amplifier with the matching Origin212A cabinet. The stock speakers are 2 x Celestion Seventy-80 (80W, 16Ω), but I always liked the Celestion Greenback speaker I have in my Vox Night Train cab. Hence I decided to replace the Origin212A stock speakers with 2 x Celestion Greenback G12M (25W, 16Ω). And yes, that would reduce the cabinet power rating from the stock 150w to only 50w, but as all of my amp heads are 25w or less, it’s not an issue for me.

So naturally, I did a bit of research to get an idea of what I was about to get into before taking my cabinet apart, but I didn’t really find what I was after. However, I distinctly remembered seeing something ages ago about cabinet speaker jacks being attached with a short wire; so care was definitely needed when removing the rear panel.

Marshall Origin20H / Origin212A Stack

As I assumed, this was quite a straightforward process, and these are the steps I took:

  1. Unscrew and remove the side handles
  2. Take flash photos of the speaker jack wire connections for reassembly reference
  3. Disconnect the speaker jack wire from the top speaker via the side handle holes
  4. Unscrew and remove the rear panel (might be a bit stiff with the tolex sticking in places, but you can push outwards via the side handle holes).
  5. Take more photos of the stock speaker wiring connections for reassembly reference
  6. Check that the stock speakers were indeed 2 x Celestion Seventy-80 (80W, 16Ω) as listed on the Marshall website under the Origin212a technical specification
  7. Purchase 2 x Celestion Greenback G12M (25W, 16Ω)
  8. Install the new speakers in same orientation with the same wiring the as stock speakers
  9. Reassemble cab (checking reference photos and being careful not to overtighten screws)
  10. Read this article from Celestion: How to break-in a guitar speaker

I didn’t do any before/after sound comparisons because my cab was laying about in bits waiting for the new speakers to be delivered. Did I hate how the stock speakers sounded? No, but the Greenbacks are UK-made and do sound better for this amp’s intended purpose, which is being the vintage-sounding opposite of my Mesa Mini Rec. Even from memory, the new speakers definitely sounded warmer and less brittle than the stock ones.

Since I’ve had the Marshall (as my Vox Night Train 15H amp is still dead with an electrical fault), I haven’t liked how some of my pedals sounded, but I think the new speakers may have resolved this. Time for another round of “pedal drawer redemption” it seems. 😬

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