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Twin Cabs with mis-matched speakers

Discussion in 'Amp Central Station' started by 100LL, Aug 8, 2020.

  1. 100LL

    100LL Tele-Meister Silver Supporter

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    Question for the crew regarding extensions cabs.

    I bought this Fender 112 extension cab and of course I can't leave well enough alone. It won't quite swallow 2 12" speakers, but with a modified baffle I might be able to get one 12 and one 10 in there.

    Got me thinking not only about mixing different sized speakers (which seems like no big deal), but also about the larger topic of mixing different speakers altogether.

    I know some guys have done different speaks on their twins, and there's probably something to it. At the risk of being the kid at the spice rack, just throwing random stuff in the pot.

    I have a hard enough time choosing one speaker, let alone the cocktail of two.


    [​IMG]
     
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  2. 100LL

    100LL Tele-Meister Silver Supporter

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    Oh, and I also had a plan of putting a selector switch on the back...

    something like:
    1. Eminence 1258 - 8 Ohms
    2. Celestion G10 Gold - 8 Ohms
    3. Both Series - 16 Ohms
    4. Both Parallel - 4 Ohms
    Why you ask. Just for the purpose of experimenting to explore different sounds with different speaks.
     
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  3. schmee

    schmee Doctor of Teleocity

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    It's all about how that combo of speakers works together, they can compliment each other like a horn and woofer, or sound bad like two woofers.
    Some makers make a 10 and 12 that are nearly identical. Many change the spec of the 10 though.
    A Weber 10F150 and 12F150 have pretty much the same characteristics; 1.5" Voice coil, magnet etc. That type would work good together.
    I had a 12+10 cab for a while that I tried a 12F150 Weber with a cheap Jensen C10Q. Those two worked well together with the 12F150 loud and big bottom and the C10Q crisp, not that loud and minimal bottom.

    There are so many variables though that it's a turkey shoot unless you just select two similar full range speakers... or roll the dice!
     
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  4. VintageSG

    VintageSG Friend of Leo's Ad Free Member

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    Can you get 4 8" speakers in there on a new baffle?

    How about some 6x9" ovals?, pulls from organ chassis.

    Would a 15" fit?
     
  5. zeke54

    zeke54 Tele-Afflicted Silver Supporter

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    I built a 2x10 cab because I had extra speakers laying around , it turned out to be my favorite cab , sound-wise . I put in a WGS Veteran 20 and an Eminence Alnico Legend . Open back cab wired to 16 ohms . Sounds glorious with my Vox Night Train 15 , and several other low wattage amps I have . I just stumbled on this combination . Like schmee said above , it's really a roll of the dice , so many combinations available .
     
  6. tah1962

    tah1962 Friend of Leo's

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    When pairing speakers be aware of the SPL/dB levels of each speaker. As a rule of thumb, one speaker should not vary more than 3dB from the other for best results.

    Example: Speaker 1 = 95dB, Speaker 2 = 98dB. This would work fine without the higher rated speaker over powering the other.
     
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  7. zeke54

    zeke54 Tele-Afflicted Silver Supporter

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    Good point tah .
     
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  8. 100LL

    100LL Tele-Meister Silver Supporter

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    it's 22x14 useable so:
    • a 15" speak is a no go
    • 2x12" a no go (or is it?)
    • 4x8" is possible
    • 2x10" + 2x8" is also possible (although borderline strength)
    • 12" + 10" (as first discussed) is possible
     
    Last edited: Aug 8, 2020
  9. jackal

    jackal Friend of Leo's Platinum Supporter

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    I put two 12s, an eminence Lil Texas and a Red Fang in the same cabinet. I wired each one to their own input jack. All my amps have two speaker out jacks, so I can run both with one amp or use two amps with the same cabinet. Either way it sounds great.
     
  10. 100LL

    100LL Tele-Meister Silver Supporter

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    That must have been a SQUEEZE jackal!
     
  11. Dukex

    Dukex Tele-Afflicted

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    I like your idea. A few years ago I modified an old organ cab into a 4x10. Wired each 16 ohm speaker separately, so I can play each individually. Made a parallel chord so I can play any two in combo @ 8 ohms. Total of ten options. I also have a Weber Z-Matcher.

    Additionally, I read that matching efficiency (dBs) so one isn't too much louder is important, so that's what I did, understanding that all rules may be broken depending on what overall tone the player is seeking.

    All Webers: Silver Ten, Blue Pup, 10F150, 10A100.


    007.JPG 011.JPG
     
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  12. 100LL

    100LL Tele-Meister Silver Supporter

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    those are 10" speaks? that cab must be a beast. bet it doesn't move much!
     
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  13. archetype

    archetype Fiend of Leo's

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    What are you trying to achive with putting two speakers in a cab that small? What end result do you want, other than the satisfaction of doing it?
     
  14. Dukex

    Dukex Tele-Afflicted

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    You are correct, sir, it never moves. :D
     
  15. Euphonica

    Euphonica Tele-Meister

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    One time I had a 2 x 15 Showman cab that had only one speaker in it, as well as a Twin with only one speaker in it. Both JBLs. So I used a cab combiner box and plugged both speakers in to the ‘62 Twin, and it sounded amazing! Now that could be because it was two cabs, one open back with an open speaker hole, and a closed back with an open speaker hole. Since then, I have fantasized about making a cab with a 15 + 12. Someday...
     
  16. 100LL

    100LL Tele-Meister Silver Supporter

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    It's not that small. (that's a tweed champ cab behind it, and a blues deluxe (not a blues junior) on top of it). I will say, it makes a right proper blues deluxe stand :)
     

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  17. 100LL

    100LL Tele-Meister Silver Supporter

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    Where do you get the dB data? I've been looking but it never seems to be a published spec.
     
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  18. tah1962

    tah1962 Friend of Leo's

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    Celestion, Eminence, and most others; excluding Weber, have the SPL/dB data on their websites. Just find the speaker you’re looking for and it will take you to a full data SPEC sheet.
     
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  19. 100LL

    100LL Tele-Meister Silver Supporter

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    Thank you, I looked them up.
    I have an Eminence Legend 1258 in my Fender 112 Extension cab.
    I have a Celestion G10 Gold in my PRRI

    When I drive them simultaneously the G10 dominates the mix. The Eminence sounds great on its own...but running together it's hard to even hear it.

    Now for the curious followup regarding their specs:
    1. G10 Gold sensitivity: 96dB
    2. Legend 1258 sensitivity: 100.1dB
     
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  20. tah1962

    tah1962 Friend of Leo's

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    Hmm, based on the SPL the Legend should be the dominate speaker. Is your amp sitting on top of the extension cabinet?
     
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