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Bp102-4 2x10 cab build

Discussion in 'Amps [BG]' started by Scocha, Jan 17, 2014.


  1. Scocha

    Scocha

    Joined:
    Jan 17, 2014
    Other members projects inspired this one.
    Hoped this might do the same for someone.

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  2. bgavin

    bgavin

    Joined:
    May 3, 2001
    Location:
    Orangevale, CA 95662
    Very nice work.
    Especially the center brace between the drivers, where the baffle is so sparse...
     
  3. DanBass81

    DanBass81

    Joined:
    Mar 26, 2012
    Location:
    Ireland
    Where did you get the plans for this?
    Did you design it yourself?
    What drivers did you use?
    How much does it weigh?
    How does it sound??

    LOOKS GREAT!! I WANT TO BUILD ONE! :hyper::hyper::hyper::hyper::hyper:
     
  4. tubatodd

    tubatodd Supporting Member

    Joined:
    Oct 31, 2004
    Location:
    Birmingham, AL
    Speechless! I really wish I could do something like this. OUTSTANDING!
     
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  6. 3rdcurve

    3rdcurve Supporting Member

    Joined:
    Dec 26, 2008
    Location:
    Bourbon, MO
    Very clean build, nice work!
     
  7. tjh

    tjh Supporting Member

    Joined:
    Mar 22, 2006
    Location:
    Minnesota
    Very nice work .. you can really see the attention to detail and the level of your talent and craftsmanship ...

    I generally run sealed cabs, so I am kind of surprised with the length of the tube ports, did specs for this come from a program?

    I like that you have feet on the ends also for vertical alignment ...
     
  8. jongor

    jongor Supporting Member

    Joined:
    Jan 11, 2003
    Location:
    Maine
    that's funny I have two BP102's I was just today thinking about putting them in a cab.

    did you run the cab in WinISD?
     
  9. Downunderwonder

    Downunderwonder

    Joined:
    Aug 26, 2009
    Location:
    New Zealand
    You can get bass cab tunings from Eminence website in pdf.
     
  10. Scocha

    Scocha

    Joined:
    Jan 17, 2014
    Hi guys
    Thank you for your nice comments.
    The design is based on half a 600w 4x10 eminence web site plan.
    Checked in software.
    2.5 cubic ft tuned to 43hz , 2 x 4" ports 10.75" long.
    The drivers are bp102-4 4ohm 200w.
    Both cabs cut from one 8x4 sheet of 18mm ply.
    They are to complement an in ear monitor set up live so I will run them from
    35hz to 250hz but couldn't resist testing them full range with an Ampeg svt4 head and they sound great (rock ampeg type tone)
    Haven't weighed them yet but very comfortable lift due to dimensions.

    Thanks again for your comments.
     
  11. jongor

    jongor Supporting Member

    Joined:
    Jan 11, 2003
    Location:
    Maine
    Looking at the Eminence cab design sheets...so you did half the 4x10 because it's the only vented one?

    wait...there is a 2x10 vented design.
     
  12. jongor

    jongor Supporting Member

    Joined:
    Jan 11, 2003
    Location:
    Maine
    I'm going to build a pair of these too, a few questions though...

    When modeling theses speakers what kind of frequency response is the goal, and what should be the goal?

    I play 4 string in a funk band and sometimes use an octave pedal, but rarely go below C when I do.
     
  13. jongor

    jongor Supporting Member

    Joined:
    Jan 11, 2003
    Location:
    Maine
    Bump....to see if I can get my question answered without starting a nearly identical thread.
     
  14. Downunderwonder

    Downunderwonder

    Joined:
    Aug 26, 2009
    Location:
    New Zealand
    Eminence pdf shows power handling vs frequency and recommended high pass filter.

    In terms of your octave C goal, with a natural string note most of us are ecstatic to get a strong 2nd harmonic. I presume octaver pedal generates the odd harmonics of the lower fundamental, which are all above the natural fundamental and unaffected by a highpass.

    Bgavin might help you out with a custom tuning to "blast" 63hz, I can't vouch for how loud it will get.
     
  15. will33

    will33

    Joined:
    May 22, 2006
    Location:
    austin,tx
    Disclosures:
    Use of this field for any other purpose is prohibited
    OP, what nice work...really cool. Would make a good proper live rig on its own, but man, what a great choice for adding live rumble in the feet/blows to the body to an IEM rig.

    Best of both worlds...really nice job.
     
  16. will33

    will33

    Joined:
    May 22, 2006
    Location:
    austin,tx
    Disclosures:
    Use of this field for any other purpose is prohibited

    Haven't done much modeling with the 4 ohm versions. For the 8ohm versions, 3 cu.ft. net with a 41-42hz tuning ( two 4" I.D. pipes ~10 to 10-1/2" long ) is a bit of a sweet spot, IMO. A bit largish for a 210 but not overly so. Gives you a "boom hump" less than +2db, -3db @ 45hz, -10db @ 31hz. Basically an extraordinarily deep sounding cab for downtuning or octave pedals. 175+ watts displacement limit if you're playing sinewaves, which means it'll cleanly reproduce what about a 400 watt bass amp has to give if you don't use additional bass boosting.

    You could even use the OP's size and tuning from this post and have nice results. Loss in lowend extension probably hardly even be noticable, displacement limit come up around 200 watts, "boom hump" still not enough to be boomy, and a bit smaller cab to carry. Building from 1/2" ply would lighten the load somewhat, but not all that much on a small cab like a 210 and the additional bracing needed is a bit tedious/labor intensive. Only have to build it once though.
     
  17. jongor

    jongor Supporting Member

    Joined:
    Jan 11, 2003
    Location:
    Maine
    Thanks will33!
     

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