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Introducing: The Pit Vipers (Ooh Yeah!!!)

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  • djg
    replied
    What happened?

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  • 9sheng
    commented on 's reply
    Yes. The baffle is a single piece, I may use 18mm mdf board + 2mm solid wood board to stick together, so that the surface will look more textured. Secure it with numerous screws around the panel.

    In fact, I am still indecisive at the moment, and have not yet finalized whether to use a detachable panel. A lot of screws on the panel will also not look so good.

    I saw the forum post last night and I was wondering if it would be better to improve another kind of internal support.
    Quoting images from the forum



    I ordered the speakers from soundimports and they have arrived in my locker after 108,000 miles and he is looking forward to my construction as soon as possible.

  • Paul Carmody
    commented on 's reply
    Were you planning on doing a removable baffle?

  • Serenitynow
    replied
    I just noticed the 5.0 mH Iron Core inductor is showing up as IN STOCK on PEs website

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  • 9sheng
    replied
    Paul Carmody It took me some time to make a structural diagram of the enclosure. I made some changes to the internal bracket. I used two pieces of wood with a width of 36mm to connect the back, lock a screw + glue, and it should be very strong. I adjusted the internal horizontal brackets to the upper and lower edges of the subwoofer. I think the subwoofer will bring more vibration, so I installed the brackets closer to the subwoofer.
    Due to the height of the PVC cap of the midrange speaker, it may touch the vertical bracket wooden bar. We can adjust the position forward and backward by adjusting the 36mm wide wooden bar connection points on the left and right sides. I also added 2 wooden strips on the left and right sides of the back baffle for glue sticking, which should help strengthen the overall back panel.
    I adjusted inches to millimeters. The overall cabinet structure is obtained.
    I upload 3D source file, please help me to check, is the size correct?
    And is my internal support structure reasonable?
    Thanks!
    Click image for larger version

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    Pit Vipers 3D (SketchUp 2019) File Download

    https://drive.google.com/file/d/1STu...ew?usp=sharing

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  • Paul Carmody
    commented on 's reply
    I used the ones with the flat bottom that you show in the Amazon picture.

  • djg
    commented on 's reply
    You would want it big enough for the speaker to fit inside.

  • Serenitynow
    replied
    I've been wondering about the internal volume for the midranges as well.

    I don't think ( I could be wrong however ) that it really matters unless the driver is playing close to fs. I can't remember the specs right off hand, but I don't think Paul has them playing that low in this design.

    Someone more knowledgeable will hopefully settle our confusion about this.

    Just checked.
    Fs of the mid is about 52 Hz. Looks like they're being crossed at around 450 Hz. I don't THINK the size of the enclosure for them will matter in this case.

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  • Paul K.
    commented on 's reply
    18-mm wood has a thickness of 0.708 inches, as compared to 0.75 inches for 3/4" wood. I've been using 18-mm Baltic Birch Plywood for years for speaker building and it works just fine.
    Paul

  • 9sheng
    replied
    I was looking for 6" PVC pipe caps and found some differences.

    Click image for larger version

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    No.1 As shown in the picture above, the pipe cap of model DN150 has an inner diameter of 160.7mm, an outer diameter of 184.5mm, the height of L1 is 86.5mm, and the height of L2 is 125.9mm. It will have a spherical bump at the top. So his total height is 125.9mm.
    I looked at paul's photo and it looks like he has bumps too.



    No.2 I saw the cap numbered 6P06 from Amazon, his total height is only about 80mm.
    this is the connection
    https://www.amazon.com/NDS-6P06-Solv...7344569&sr=8-2
    Click image for larger version

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    No.3 I also found another specification of the cap, their inner diameter is 160mm, but their height is different. Below is the connection
    https://www.plasticpipeshop.co.uk/6-...Cap_p_716.html
    Click image for larger version

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    I know that the size of the interior space formed by different heights is different, so I need you to help me determine which model. Or in small differences, there will be no effect on the sound? Can I choose No.1 first?

    As long as the diameter is 160mm, whether it is a raised hat or a flat hat, the same internal space can be achieved at a certain height. But if you choose a flat hat, how much height do you need?

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  • 9sheng
    commented on 's reply
    Thank you, please allow me to thank you again for your designs, I am a big fan of yours

  • djg
    replied
    Here's a link to a Troels SBA 8" 4" dome tweeter 3 way speaker, significantly smaller than the Viper, with some good construction pictures.

    http://www.troelsgravesen.dk/SBAcoustics-3WC.htm

    Leave a comment:


  • Serenitynow
    replied
    Nevermind. I see now it is for your designed speaker

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  • Serenitynow
    replied
    Originally posted by Wesley H View Post
    Thanks. I braced the heck out of it.
    I see you didn't use the PVC cap on the rear of the mid. Instead you enclosed it. I've been thinking this as well.
    What size enclosure did you use for it ?
    Oh. Nevermind. I see now it is for your design.

    Leave a comment:


  • Wesley H
    replied
    Thanks. I braced the heck out of it.

    Leave a comment:

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