15" Dual Voice Canon is ready.. almost

Discussion in 'Archived Threads 2001-2004' started by Jedd, May 9, 2002.

  1. Jedd

    Jedd Second Unit

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    Finally. I finished assembling of my tube last night, put it in the side firing position (endcaps have square form) and.. went into the bed. Well, it was about 1am. So, the whole night I was "the dreaming man shooting at the world". [​IMG]
    The first thing in the morning was some Deep Purple, Led Zeppelin and LOTR trailers, to hear what I've got.
    OMFG! (especially when The Ring hits the floor in the Bilbo's house. I can feel it in my butt, chair, basement, house and neighbors where excited too, I bet [​IMG] ).
    But not everything is so good as I would like it to be.
    1) a lot of noise, hum and buzz - I didn't my finish cables yet, so had to connect everything with simple non shielded RCA-end wires. I hope I'll get some improvements when I replace them with #RG6 quad + Centerpin(r) RCA's#
    2) bass is delayed. It's hard to describe, but I feel like it just a bit late. "Woof" - say the main speakers, "woooooof" answers the sub, like an echo. (very powerful one). [​IMG] At this point, I'm not sure what to do, maybe some phase tweaking will help.
    P.S. canon is not a canon, it's just a cannon. :b
     
  2. Jedd

    Jedd Second Unit

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    Borrowed a digital camera from a friend of mine. Here we go (the link is slow, so it will take some time to load):
    Photo 1
    HTPC room view.
    Photo 2
    Getting closer to the sub.
    Photo 3
    Without flash.
    Photo 4
    Side view.
    Photo 5
    Rear endcap. I feel I have to marry this sub after everything I did with it from the rear. [​IMG]
    Photo 6
    Where does he crawl?
    Just a weird looking angle.
    (Admin changed images to clickable links to speed up page load)
    P.S. kewl, didnt know how to do it.
     
  3. Dave Poehlman

    Dave Poehlman Producer

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  4. Jedd

    Jedd Second Unit

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    Probably it is the cheapest 15" DVC powered sub in the world. (prices include shipping and taxes)
    Endcaps: MDF 2x4 + BB 2x4 = $22 (HD)
    Tube: 22"x2 = $23 + free t-short. [​IMG] (White Cap)
    250 PE Amp = $105 (MCM)
    15" Dayton DVC = $112 (PE)
    polyfill + sock = $14 (JoAnn)
    1 tube of liq. nail = $3 (HD)
    some caulk and nails = free (garbage heap in the basement [​IMG] )
    -------------------------
    total = $280
    Instrument used: sabresaw, power drill.
    Can be done in two days without any hassle if you have all parts ready.
    Also what I noticed - you don't need to paint the tube if you use black lycra.
     
  5. Jeffrey Noel

    Jeffrey Noel Screenwriter

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    That's a pretty cool, and easy, design you got there Jedd. How does it sound? Does it meet your expectations?
    BTW, I think it's about time for a computer desk huh? [​IMG]
     
  6. Jedd

    Jedd Second Unit

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    Thanks,
    I've changed the design several times (and annoyed everyone here [​IMG] ), after all I came up with this one as the most compact. It fits into 2'x2' virtual cube.
    Not too much I can say about the sound, because I never heard a sub before. I do believe it will kick out any commercial sub from the bestbuy in the terms of shaking-my-butt ability, but I'm not sure about the accuracy.
    See my first post in this thread.
    Anyone in Boston area who would like to test it? [​IMG]
    Yeah the next project is computer table and speaker stands. [​IMG]
     
  7. Patrick Sun

    Patrick Sun Moderator
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    Jedd, have you reversed the polarity on the leads to the driver from the amp (just reverse the positive and negative amp leads to the driver)? That might get rid of the delay you are hearing.
     
  8. ThomasW

    ThomasW Cinematographer

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    Jedd

    You'll get better sound quality if you put the mains on some stands and place them 1/3rd the width of the room in from the side walls and out 4' or so from the backwall.

    Having the sub in the corner of the basement will result in a ton of room gain since there are no bass losses through concrete walls
     
  9. Jedd

    Jedd Second Unit

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  10. Bryan Michael

    Bryan Michael Supporting Actor

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    if that is a hk recever you might have delay settings i have one for my onkyo i set the distance that all speakers are from my sewwt spot so it get the delays right
     
  11. Cam S

    Cam S Screenwriter

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    Jedd, nice looking sub. What is the internal volume of the tube?

    BTW, that wall you have is really interesting, how long did it take to finish it?
     
  12. Jon Torres

    Jon Torres Second Unit

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    It looks real good. I'm guessing the MDF is for a circular plug for the sonotube, right? If so, how did you cut it out w/ only the sabresaw and powerdrill? Thanks.
     
  13. Jedd

    Jedd Second Unit

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