Why so few open back 4x12's?

Discussion in 'Amps and Cabs' started by MHG, Feb 24, 2015.

  1. MHG

    MHG Member

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    Why aren't open back 4x12's more popular? People that have them, seem to love them. Are there any builders that currently offer them? Thanks in advance for your responses.
     
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  2. ClassicLP

    ClassicLP Member

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    Mostly loud metal, punk, et al guys use them, so there is marketing demographic. Those guys want to feel the air pumping and focused low end. Open back would defeat the purpose.
     
  3. geek-mo

    geek-mo Supporting Member

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    There are so few that I will probably build my own when the time comes.
     
  4. big mike

    big mike Moderator - EL34 Emeritas Staff Member

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    I like the partially open myself.
    I'm about ready to cut a big section out of the back of mine.
     
  5. cardinal

    cardinal Member

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    I played a 3/4-backed Mesa 4x12 a while back (I'm not talking about those 1/2 back ones with the metal grills; this was a true 3/4 back). It was a touch smaller than a typical 4x12.

    It sounded absolutely great for lots of things. I play rock/hard rock with 7-strings, and unfortunately the cab simply could not hold it together for some of that stuff. But if I played with less gain and less strings, I would have bought it immediately.
     
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  6. MHG

    MHG Member

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    I was thinking 4 Blues in a smaller 4x12 Pine cab. The Bruno 4x12 would have been perfect. Does anyone know of any builders that make anything like the Bruno 4x12's?
     
  7. big mike

    big mike Moderator - EL34 Emeritas Staff Member

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    If you had the dimensiosn, I'm sure Stagecraft, J Design or some other could do it for you.

    I've been tempted to have the old PRS 4x12 duplicated myself with a half openback.
     
  8. Longer

    Longer Member

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    My Mesa 2x12 metal grill half back is the tits, but the 4x12 version is over 110 pounds! No thank you.
    But beyond that particular model, my guess would be that the market hasn't demanded 4x12 half backs, because if it did, more would be made.
    Anyway, if you do go custom, go convertible. It's good to have options! :)
     
  9. MHG

    MHG Member

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    Those J-Design cabs look really nice. That Thinline cab is so cool!
     
  10. amphog

    amphog Silver Supporting Member

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    At the volume most can use, 4x12 open backs are only really needed with low watt drivers.
     
  11. Lance

    Lance Member

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    You may want to try a detuned 4 x 12. Remove one speaker from the closed back, which opens up a huge port, sort of like a Mesa Thiele.
     
  12. T Dizz

    T Dizz Member

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    anyone ever seen those "hermit cabs" ? Kind of a cool idea. I don't know if they do 4x12 though
     
  13. Zuper

    Zuper Supporting Member

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    Petersen cabs (ToneFree on TGP) has made at least one that I've seen.

    I'm sure the builders mentioned above would be happy to oblige, as well.
     
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  14. IbanezRokr

    IbanezRokr Member

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    Why would I want one?
     
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  15. J M Fahey

    J M Fahey Member

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    Care to share how will you solve the impedance issue after you remove *one* speaker in a 4x12"?

    Just curious.
     
  16. Lance

    Lance Member

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    Sorry. I meant two speakers out of a 4 x 12. Like a criss-cross pattern. Or both bottoms. You get the porting effect, and still have the slanted ones aimed more towards your head.
     
  17. Belmont

    Belmont Member

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    unless the ports are tuned (which they wouldn't be), they're useless.
    also, even if they were, they would only support the octave below the low E fundamental, which a guitar doesn't even produce, so really that's not the best plan.
    I just use combo amps if I want an open back sound or sealed 2x12 or 4x12 for a closed back sound.
     
  18. amphog

    amphog Silver Supporting Member

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    Personally, front ported cabs and guitar amps do not do it for me, but a 4x12 with alnicos, and a vertical slot back, can sound pretty sweet with a JTM style amp.
     
  19. Balok

    Balok Member

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    I've tried open backed 4x12s with 4 speakers, 2 speakers, 3 and even one, ported in front (don't like the loose muddy reflected sound of the open hole) closed back and open back 2x12s, open and closed back 1x12s.
    The only 2 configurations I like are closed back 4x12s and open back 1x12s. 2x12 open back was fine but no better than a 1x12.
    The closed back 4x12 gives the low and low mid punch that bring power chords to life. if I'm not doing a rock gig where lots of power chords are played, a 1x12 combo will be fine. YMMV
     
  20. Dubious

    Dubious Member

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    i run a detuned cab ... Sounds killer
     
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