Closed Thread
Results 1 to 10 of 10

Reload Thread: Any sound difference between MDF and Birch?

  1. #1
    jmass03's Avatar
    jmass03 is offline Member



    Join Date
    Oct 2004
    Location
    FL
    Posts
    136
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Any sound difference between MDF and Birch?

    Getting a box made however the gentleman whos making it only has a 1.5" for the baffle. In the W7 manual I believe it says the baffle must be at least 1". Would a 3/4 13 ply birch be better, or just regular MDF?

    What specs should I follow? JL's specs for the 12W7 at 15.5 H x 15.5 W x 15 D?







  2. #2
    jmass03's Avatar
    jmass03 is offline Member

    Threadstarter


    Join Date
    Oct 2004
    Location
    FL
    Posts
    136
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    Nm, found the answer to the first question.

    Can anyone answer the second one though? Didn't really get any useful replys in the subwoofer section.




  3. #3
    helotaxi's Avatar
    helotaxi is offline Kilroy was Here



    Join Date
    Dec 2003
    Location
    South Central (New Mexico that is...)
    Age
    39
    Posts
    8,933
    Post Thanks / Like
    Images
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    Either type wood will be fine. Just double up what is used for the baffle.

    You can go with JL's spec or go a little bigger. The volume of air inside the box is what matters, not the dimensions. So if you want it wider or taller or whatever, take away from the other dimensions to get the internal air volume the same and you'll be good.



    Artificial Intelligence is no match for Natural Stupidity.

    Never underestimate the power of stupid people in large numbers.

    Life's tough...it's even tougher when you're stupid.

  4. #4
    Ed Lester's Avatar
    Ed Lester is offline SPL and Lights



    Join Date
    Mar 2008
    Location
    Philly Pa
    Posts
    1,439
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    Quote Originally Posted by helotaxi View Post
    Either type wood will be fine. Just double up what is used for the baffle.

    You can go with JL's spec or go a little bigger. The volume of air inside the box is what matters, not the dimensions. So if you want it wider or taller or whatever, take away from the other dimensions to get the internal air volume the same and you'll be good.
    Not exactly true.
    A deeper box will give you less impedance rise and sometimes a deeper response whereas a shallow box will have a higher box rise and more back pressure built up on the rear of the cone.



    The Real
    Edward Lester
    dB Drag World Finals 03, 05, 07, 08 3rd place SS-NW
    so far in 2008 with 4) T3 Audio TSS V2 12s and 1) Hifonics XXV Maxximus = 153.5 dB and Bass Race 149.3 dB
    .
    Team RazorLite
    Team T3Audio
    Team XS Power
    Team Second Skin
    07 HHR

  5. #5
    helotaxi's Avatar
    helotaxi is offline Kilroy was Here



    Join Date
    Dec 2003
    Location
    South Central (New Mexico that is...)
    Age
    39
    Posts
    8,933
    Post Thanks / Like
    Images
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    If you say so. Yet to see that happen in practice but being not an SPL guy Ireally don't pay much attention to box rise.



    Artificial Intelligence is no match for Natural Stupidity.

    Never underestimate the power of stupid people in large numbers.

    Life's tough...it's even tougher when you're stupid.

  6. #6
    iamamp3pimp's Avatar
    iamamp3pimp is offline Bass Heads Entertainment



    Join Date
    Nov 2003
    Location
    Tampa FL
    Age
    33
    Posts
    13,103
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    21 Post(s)

  7. #7
    Ed Lester's Avatar
    Ed Lester is offline SPL and Lights



    Join Date
    Mar 2008
    Location
    Philly Pa
    Posts
    1,439
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    Quote Originally Posted by helotaxi View Post
    If you say so. Yet to see that happen in practice but being not an SPL guy Ireally don't pay much attention to box rise.
    It would be more of an SPL thing.
    I have built hundreds if not thousands of boxes, mostly geared towards SPL, and can notice up to a 1.5 ohm difference when reducing depth by 2 inches and extending width.

    But also for SQ, internal shape can be very important in ported boxes. angles can be adjusted to load the port properly. Also the shape can be adjusted to keep a standing wave from building behind the cone. A standing wave will limit the subs accuracy and make it sound sloppy.



    The Real
    Edward Lester
    dB Drag World Finals 03, 05, 07, 08 3rd place SS-NW
    so far in 2008 with 4) T3 Audio TSS V2 12s and 1) Hifonics XXV Maxximus = 153.5 dB and Bass Race 149.3 dB
    .
    Team RazorLite
    Team T3Audio
    Team XS Power
    Team Second Skin
    07 HHR

  8. #8
    helotaxi's Avatar
    helotaxi is offline Kilroy was Here



    Join Date
    Dec 2003
    Location
    South Central (New Mexico that is...)
    Age
    39
    Posts
    8,933
    Post Thanks / Like
    Images
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    Sure. It makes sense for a ported enclosure. Sealed is a whole different ballgame and is the question at hand. In a SUB woofer setup you'd only have to worry about standing waves an the like and their effects on loading the cone in really big boxes that are allowed to play really high. For a smallish sealed setup, really only the volume of air behind the driver matters.



    Artificial Intelligence is no match for Natural Stupidity.

    Never underestimate the power of stupid people in large numbers.

    Life's tough...it's even tougher when you're stupid.

  9. #9
    Ed Lester's Avatar
    Ed Lester is offline SPL and Lights



    Join Date
    Mar 2008
    Location
    Philly Pa
    Posts
    1,439
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    Yeah, ported boxes are more finicky. Shape can kame a difference in small ported, I have tested and heard differences but it is minute differences unless you run extremely high power.



    The Real
    Edward Lester
    dB Drag World Finals 03, 05, 07, 08 3rd place SS-NW
    so far in 2008 with 4) T3 Audio TSS V2 12s and 1) Hifonics XXV Maxximus = 153.5 dB and Bass Race 149.3 dB
    .
    Team RazorLite
    Team T3Audio
    Team XS Power
    Team Second Skin
    07 HHR

  10. #10
    PV Audio's Avatar
    PV Audio is offline The Vision of Sound



    Join Date
    May 2004
    Location
    Indy
    Age
    25
    Posts
    19,655
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)

    Re: Any sound difference between MDF and Birch?

    Short answer? Not that you'll notice.




Closed Thread

User Tag List

Posting Permissions

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