Compact 12" 4 ohm ultralight sub

Discussion in 'Amps [BG]' started by rberry7777, Oct 4, 2013.


  1. rberry7777

    rberry7777 Supporting Member

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    Anybody have a good design?
     
  2. CL400Peavey

    CL400Peavey Supporting Member

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  3. rberry7777

    rberry7777 Supporting Member

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    For biamping a bass rig
     
  4. CL400Peavey

    CL400Peavey Supporting Member

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    What are you using to cover the mids?

    What kind of amp are you using?

    What kind of cross over are you going to use?
     
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  6. B-string

    B-string Supporting Member

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    To be clear, you want:
    Small.
    Light.
    Loud.
    Low.
    ;)
     
  7. T-Bird

    T-Bird

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    Hi.

    Which equals very, very expensive if You need to buy it.

    If DIY is Your goal, either take one of BFM designs and do a foam core CF version, or compromise on one or more of your goals.

    Regards
    Sam
     
  8. will33

    will33

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    No need for the 4ohms part, so you could just build a fEarful 12sub and leave out the filters seeing as you have an active crossover.

    This assuming of course that the rest of your setup is suitable for biamping.

    If you want to give up compact for loud, you can load the same woofer into a Fitzmaurice Titan39.
     
  9. mbelue

    mbelue

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    Foamcore BFM would be huge.
     
  10. will33

    will33

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    The 1/2" ply ones aren't overly heavy, it's just that they're about the size of a 610 bass cab, so not exactly compact. Crazy output from a single driver though.

    If the OP is hellbent on his 4ohms, he can load one with a pair of bp102's.
     
  11. hsech

    hsech Us old farts knew about it first. Gold Supporting Member

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    If it needs to be 4ohm, just get a GK MBEII-212 Ultra-Lite and be done with it. It weighs in at only 37 lbs and should provide plenty of low end at 600 watts should be enough headroom.
     
  12. CL400Peavey

    CL400Peavey Supporting Member

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    If he is looking for some real lows, that GK cab while very fine for many as a bass cab is not going to deliver.
     
  13. hsech

    hsech Us old farts knew about it first. Gold Supporting Member

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    I must be one of the many that the GK cab works fine for. Your opinion is no more valid than mine.
     
  14. CL400Peavey

    CL400Peavey Supporting Member

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    The OP is looking for a sub to cross over an existing cab with. The GK is not a sub. :rollno:
     
  15. mbelue

    mbelue

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    No debate on "working" you just have a cabinet with two mid bass drivers. Not going to put out as much low frequency as a dedicated sub.
    The 2x12 neo GK I tried had a decent sound, could work fine but not very deep IMO.
     
  16. CL400Peavey

    CL400Peavey Supporting Member

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    Post edit response.

    Its not about opinion. The GK you mentioned is not a sub. This is an objective statement of fact.
     
  17. hsech

    hsech Us old farts knew about it first. Gold Supporting Member

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    OK, OK...... I stand corrected. (head down with hat in hand).
     
  18. will33

    will33

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    This may all be for naught until we find out what the rest of the OP's setup is. A lot of people don't get the biamping thing done right/effectively.

    If you use a real subwoofer that can hit good output down there, you take the LF stress off your regular speakers and are able to run them up to their thermal limits again. That means even smallish combos can run pretty darn loud...like small guitar combos do.
     
  19. B-string

    B-string Supporting Member

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    Just to clarify if you plan a BFM Titan 39 better build the 30" wide version for it to even come close to a "sub" application (still a fail in the strict terms of a "sub woofer").
     
  20. will33

    will33

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    It's just different opinions of what "lows" are.

    Real subwoofers is geared to only cover the area from 30-40hz up to 100-150hz or so. Just the area you need cone excursion to do. When a regular speaker doesn't have to play that stuff, it can pushed harder/run louder.

    When many people talk about "lows" in a bass cab, they're hearing stuff that about an octave higher than the stuff that's down towards the lower end of a real subwoofers range. The GK's will play strong around 60-80hz, not 30-40.
     
  21. will33

    will33

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    Yup...they're live sound subs. You can watch the output go up and the extension go down when you add more to the pile.

    If you want 30hz, you use the Tuba...and give up some spl to get there. Live sound cuts off around 40-50hz.
     

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