Closed Thread
Results 1 to 9 of 9

Reload Thread: for ev02k3 ported box help

  1. #1
    billetz23's Avatar
    billetz23 is offline Member



    Join Date
    Dec 2001
    Location
    usa
    Posts
    116
    Post Thanks / Like
    Mentioned
    0 Post(s)

    for ev02k3 ported box help

    hi ev02k3 - i am planning to build a slot/ported box tuned to 39hz
    for a 10'' solobaric L7 these are the spec for box (external)

    height - 14''
    width - 16''
    depth - 16''
    for a internal volume of 1.521 cubic feet

    spec for port -
    height - 12.5''
    width - 1.75''
    length - 20.75''

    ev02k3 will this box work for the 10''L7
    or what mesurements would you recommend as to box
    height,width,length (and port) height, width, length and tuning feq (hz)
    thanks for your help.







  2. #2
    evo2k3's Avatar
    evo2k3 is offline Senior Bizznitch



    Join Date
    Dec 2002
    Location
    Chicago
    Posts
    1,057
    Post Thanks / Like
    Mentioned
    0 Post(s)
    how much power is it running? probably wont be an issue, but want to make sure that port size wont give you un wanted noise (cause by air leaving the box at more than 30m/s)....let me know and then ill confirm those numbers



    I'm back to stock in my new car.....

  3. #3
    billetz23's Avatar
    billetz23 is offline Member

    Threadstarter


    Join Date
    Dec 2001
    Location
    usa
    Posts
    116
    Post Thanks / Like
    Mentioned
    0 Post(s)

    evo2k3 ported box help

    evo2k3 thank you for the reply
    my 10''L7 is a dual 4ohm voice coil sub i have it wired in parallel
    for a 2ohm load.
    i will be powering my 10'' L7 with my precision power
    a 600.2 (left channel) at 2ohm stereo for about 300+ watts
    if it sounds ok then i will be adding another 10''L7 dual 4ohm voice coil sub
    wired in parallel for a 2ohm load wired to the (right channel) and it will have 300+ watts at 2ohm stereo. i will be using the low pass output from my kicker zr460 set at
    60hz into the a 600.2

    my a 600.2 has no subsonic filter. will this ported box work or what
    would you recommend . your help will be much appreciated
    thanks again




  4. #4
    evo2k3's Avatar
    evo2k3 is offline Senior Bizznitch



    Join Date
    Dec 2002
    Location
    Chicago
    Posts
    1,057
    Post Thanks / Like
    Mentioned
    0 Post(s)
    ok, lets get a start on this.....the hieght and width of your port are fine, you should not have problems with noise. I would first suggest that if you have the room to go bigger, something 2+ cubes after all displaments. which brings me to my next questin, was is the exacst displacemt of the sub? (your owners manual with explicitly list this). What are the biggest demension you are able and willing to make the box? If you wanted to stick with those demensions (which you absolutley can), I used .1(a decent guess) as the speaker displacment leaving the net volume to be 1.421ft^3 ...useing that and the 12.5*1.75" port, its length should be 17.17 inches to tune it to 39hz ...i would still like to use the exact number if you can get them, but the guess will get you very close to 39hz.



    I'm back to stock in my new car.....

  5. #5
    billetz23's Avatar
    billetz23 is offline Member

    Threadstarter


    Join Date
    Dec 2001
    Location
    usa
    Posts
    116
    Post Thanks / Like
    Mentioned
    0 Post(s)

    ev02k3 ported box help

    ev02k3 thank you for the reply
    this is the thiele/small parameters for a 10'' L7 dual
    4ohm voice coil sub. that i copied from the L7 technical manual

    Nominal impedance - 4ohm
    SPL 1w/1m - 85.7
    Displacement, cc - 1830
    Displacement, cuin - 111.8
    Mounting depth - 6-3/8
    Revc - 3.64
    VC inductance,mh - 3.91
    Sd,sqm - 0.0439
    BL - 16.328
    Vas, liters - 35.071
    Vas,cuft - 1.24
    Mms,gms - 186.9
    Fs - 32.5
    Qms - 10.675
    Qes- 0.521
    Qts - 0.497
    Pmax,watts - 600
    Xmax,mm - 13.20

    hope this infomation will help

    i could also build a ported box with spec that you recommend
    but i need to stay at

    height - 14''
    width - 16''
    depth - 16-18.5'' will adjust depth per your instructions

    thank you.




  6. #6
    evo2k3's Avatar
    evo2k3 is offline Senior Bizznitch



    Join Date
    Dec 2002
    Location
    Chicago
    Posts
    1,057
    Post Thanks / Like
    Mentioned
    0 Post(s)
    ok heres what you can do:
    build the box to 14"x16"x18.8" (HxWxD)
    that will give you a net displacment of 1.783 ft^3 less 0.064ft^3 for the speaker, yeilding 1.72ft^3.

    port: 1.75"x12"x12.42" (HxWxL)

    that gets you tune right about 39hz, should work well for ya.



    I'm back to stock in my new car.....

  7. #7
    billetz23's Avatar
    billetz23 is offline Member

    Threadstarter


    Join Date
    Dec 2001
    Location
    usa
    Posts
    116
    Post Thanks / Like
    Mentioned
    0 Post(s)

    ev02k3 ported box help

    ev02k3 - thank you for all your help
    i'll get started on building the slot/ported box
    per your recommendation (spec)
    and l will let you know how it sounds.
    thanks again.




  8. #8
    evo2k3's Avatar
    evo2k3 is offline Senior Bizznitch



    Join Date
    Dec 2002
    Location
    Chicago
    Posts
    1,057
    Post Thanks / Like
    Mentioned
    0 Post(s)
    np



    I'm back to stock in my new car.....

  9. #9
    billetz23's Avatar
    billetz23 is offline Member

    Threadstarter


    Join Date
    Dec 2001
    Location
    usa
    Posts
    116
    Post Thanks / Like
    Mentioned
    0 Post(s)

    ported box help

    hi evo2k3
    built box to recommended spec - 14'' h x 16'' w x 18.8'' d = 1.72 cuft plus port
    port/slot spec
    12''h x 1.75''w x 12.50'' L
    ( using 3/4'' mdf)
    sub pops while playing low bass,reggae, sounds bad, like a free air at high volume
    mabe box volume to large for sub.

    put sub back into sealed box, sub returned to normal
    no poping while playing low bass. raggae
    spec of sealed box 13'' h x 13'' w x 13'' d = .88 cuft

    built new box - 13'' h x 15''w x 15'' d = 1.213 cuft plus port (using 3/4 mdf)
    port/slot spec
    11.50'' h x 1.50''w x 21.0'' L

    sub sounds better no popping while playing low bass, raggae
    more output volume (loud) only powering sub with 300 watts
    will stay with new box spec . thank you for all your help.

    aloha
    billetz23






Closed Thread

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts
1e2 Forum