My 12.309f3 sub is done with results! (long)

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  • Julian Data
    Junior Member
    • Nov 2000
    • 12

    My 12.309f3 sub is done with results! (long)

    Well my second Sonosub and this is designed using an EBS alignment and is almost done, I just need to hem to the sock.
    Here's a pic of it in the room. Nice light reflection up top, eh?




    The test procedure:

    The sub was corner loaded at in the back corner. Here's the layout (small room, eh?):




    Used Spectra Labs RTA for getting the 10%THD on the PC and the mic connection is to the RS Meter. The distance was 2m. In the past, I have measured my first DIY sub with this same technique. If you haven't noticed, this is the same way Tom Nouisane measures subs in S&V mag though my room isn't as big as his.

    For the results, I also included Adire's version of LspCAD, which modeled SPL from listening and at 1m distance.

    Sub specs are as follows:

    Net Volume: 348.4l (12.309ft3) No stuffing or lining.
    Two Adire Shiva Mk1.5
    Fb: 19Hz, 18.9Hz
    Dimensions: 24.5"DIA x 59.750"
    Ports: 2(6" x 23.500) I rounded off port length.

    Notice the ports when comparing this to other sims, they tell me a longer port to use. Say like 29" or so. Interesting, isn't it?


    Here are the results:



    Looking at the results, you can see that the sub is flat (besides the nasty mode) to 17Hz in room and LspCAD predicted this on the information window as 16.61Hz but I don't have a test tone in the 16Hz. So I can agree that LspCAD is very, very close!

    Overall, look at the frequency response of the line during the real world measurements. It's pretty dang close to what LspCAD predicted!

    As of now, I am pretty much sold on LspCAD!

    Back to the sub, What do you guys think? I am very impressed with it!

    I got some other drivers here to test with the same enclosure. Stay tuned!


    Julian
    Julian Data
    COO of Blackhole Motorsports
    http://www.bhmotorsports.com
    Revamped DIY www site coming soon!
  • Lexman
    Super Senior Member
    • Jun 2000
    • 1777

    #2
    Good work there Julian! Not just on the sub either, the writeup is excellent.

    Lex

    Comment

    • Julian Data
      Junior Member
      • Nov 2000
      • 12

      #3
      Hey Lex!

      Coming from you, I take that as a big compliment as I don't have quite the experience you have!

      I plan on testing some other 12" drivers once I loose some weight during the Turkey dinner.

      I tried msging you on ICQ..


      Julian

      PS: I do have a comparison between my first sub and this one. Interesting results by graphically looking at it.




      Julian Data
      COO of Blackhole Motorsports
      http://www.bhmotorsports.com
      Revamped DIY www site coming soon!
      Julian Data
      COO of Blackhole Motorsports
      http://www.bhmotorsports.com
      Revamped DIY www site coming soon!

      Comment

      • Lexman
        Super Senior Member
        • Jun 2000
        • 1777

        #4
        Yeah, cool. I authorized you, but never got you on my list. I messaged you just now.

        Thanks,

        Lex

        Comment

        • Julian Data
          Junior Member
          • Nov 2000
          • 12

          #5
          Thank you!

          Gobble, gobble.. hehe


          Julian




          Julian Data
          COO of Blackhole Motorsports
          http://www.bhmotorsports.com
          Revamped DIY www site coming soon!
          Julian Data
          COO of Blackhole Motorsports
          http://www.bhmotorsports.com
          Revamped DIY www site coming soon!

          Comment

          • Bing Fung
            Ultra Senior Member
            • Aug 2000
            • 6521

            #6
            Holy SPL Julian!

            "Now just build a crate for it and I'll have a courier pick it up" :B




            Bing
            Bing

            Comment

            • Julian Data
              Junior Member
              • Nov 2000
              • 12

              #7
              Hey Bing!

              I think we better contact Consolidate Freight to ship it!It definitely weighs over 75lbs!

              So you like the SPLs? I did some testing today with another driver, I'll post the results shortly!

              Julian




              Julian Data
              COO of Blackhole Motorsports
              http://www.bhmotorsports.com
              Revamped DIY www site coming soon!
              Julian Data
              COO of Blackhole Motorsports
              http://www.bhmotorsports.com
              Revamped DIY www site coming soon!

              Comment

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