I am going to do it...

1246

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  • Face
    Face Posts: 14,340
    edited December 2010
    If you used the proper amount of glue, no screws are needed.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • TrashyTrucker
    TrashyTrucker Posts: 225
    edited December 2010
    I have wondered about building a sub as well guys!

    But have never got past these questions:
    1) amp...plate or what?
    2) xo?

    just curious... did not mean to HJ this thread. Great read Vr3mxstyler2k3.
    Integra DTR 50.2 used as a preamp
    Rotel RCD 1520 cdp
    AudioQuest Jaguar 72v dbs ic's
    AudioQuest type 8 wire
    biamped to:
    2-Hafler 9500 trans nova's
    AudioQuest NRG-3 power cable's
    dedicated AC line for
    Tesla Plex 20a duplex receptacle
    Panamax Max 7500 pro surge/line conditioner
    SDA SRS 3.1 TL's modded...
    spikes, rdo's, rings, dynamat, sonicaps, mills & aeon
    Panasonic Viera G20 50" plasma


    ...SDA's are just like candy for your ears...
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    Pretty much any subwoofer needs an amp with a crossover...

    Most plate amps have a built in crossover.

    If you use an external amp you either need a crossover or just use your receiver's LFE crossover.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • FTGV
    FTGV Posts: 3,649
    edited December 2010
    megasat16 wrote: »
    Bracing is best done with cut off MDF sheets or plywood sheets glued up together too..... One reason soft wood shouldn't be used is that it'll check as it dried up inside the cabinet and the wood density is not uniform across the length.
    Agreed James,MDF would would be preferable to soft wood and 13 ply Baltic Birch would be even better as the multi layer void free plys resist flexure in all directions and is dimenionally stable.

    I use both screws and clamps with my MDF boxes.As shown in the pics I use dados to ease assembly and use the screws when I can't properly clamp a panel.I drill pilot holes and use drywall screws to pull the joint tight until the glue has dried.Afterward I remove the screws and fill the void with plastic wood.Works like a charm.
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    Yeah - I am using very limited tools...

    But since I am multi layering wood -- this will be a piece of cake and I can secure the last layer from the inside so nothing will be visible...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    I received the bolts to put the woofer together today - absolute insanity my friends...

    This woofer is LARGE.

    I cant imagine a 12 and a 15 with a 18 PR all moving together with 2000 watts. It should be fierce
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • greyford1979
    greyford1979 Posts: 749
    edited December 2010
    Any new progress on the sub?
    I love animals, they're delicious!
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    lol - I wish it would progress as fast as yours - but with it getting dark at 5 oclock and working 55-60 hours a week I dont have much time :(
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • greyford1979
    greyford1979 Posts: 749
    edited December 2010
    Vr3MxStyler2k3 wrote: »
    lol - I wish it would progress as fast as yours - but with it getting dark at 5 oclock and working 55-60 hours a week I dont have much time :(

    Damn that sucks! Yeah I have been working long hours as well and working on the sub pretty much till right before I went to sleep. My gf is real happy it's pretty much done. Too bad you don't have a garage to work on it in:frown: Still looking forward to seeing this beast of yours finished tho:biggrin:
    I love animals, they're delicious!
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    Thanks man your sub looks sweet - I hope my final product looks that good.

    My jig will be here mid week - its really all down hill from now since the box is formed. Now it is a matter of adding layers - apply the solid wood, then build the base then the platform...

    I guess it will take me a month or so to build this monster
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • greyford1979
    greyford1979 Posts: 749
    edited December 2010
    Thanks! It's gonna be tough to hand it over to my buddy:frown: Once your sub is done tho, it's gonna be worth all the time you put into it, that's for sure:biggrin:
    I love animals, they're delicious!
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    Made a little bit of progress on this today - I attached a second layer to the sides and top and sanded the whole thing down to get some glue off....

    As soon as my jig gets here (2 days) I will be able to do some more with this as the next few pieces I am going to precut the holes before I attach them so I can make sure each layer matches up...

    Either way - I think the final thickness of the enclosure walls will be 3" all over - MDF is just to fragile as far as chipping compared to the plywood - so yeah. Definitely think I am going to put a layer of plywood over the entire box then solid wood over that.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • greyford1979
    greyford1979 Posts: 749
    edited December 2010
    Awesome! Just be glad you don't live where I do right now or you would never make any progress on it outside right now lol. So then you're going with the birch plywood as the final layer? And are you going with black as the color?
    I love animals, they're delicious!
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    the third layer will be plywood - so probably will just be basic birch or oak plywood -- then take some solid wood that is preglued together to get the width I neeed and finish it out that way -- roundover the edges then stain it to my desired color and clear it
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • greyford1979
    greyford1979 Posts: 749
    edited December 2010
    Oh ok...I know it will look great! Will be looking forward to seeing it finished, and hearing how crazy ridiculous it sounds lol.
    I love animals, they're delicious!
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    Does anyone have any decent software for modeling two different active woofers and a PR?

    Im just curious what I am going to end up with here.. lol
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • greyford1979
    greyford1979 Posts: 749
    edited December 2010
    Does WinISD allow you to model this? Or can you only model it with just one active woofer in WinISD?
    I love animals, they're delicious!
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    Just one and I would need someone to show me how to use that monstrosity of a program
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    With two 15's and the 18" PR - with 2000 watts of power it says I will be able to do 20hz at 113 db?

    What a confusing program
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Face
    Face Posts: 14,340
    edited December 2010
    This may do it: http://audio.claub.net/software/kougaard/ubmodel.html
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • Sherardp
    Sherardp Posts: 8,038
    edited December 2010
    Nice project Sid, this looks intense and should turn out indeed awesome.
    Shoot the jumper.....................BALLIN.............!!!!!

    Home Theater Pics in the Showcase :cool:

    http://www.polkaudio.com/forums/showcase/view.php?userid=73580
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    Thanks!

    I downloaded Unibox and the problem remains - how do you model two drivers in the same enclosure at one time? This is silly that someone has not thought of this.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 28,741
    edited December 2010
    I compromised --

    I modeled the 12" drivers with the 12" PR at full mass - with 1 signal watt - 80hz is 82db, 50hz is 82db, 30hz is 78.6, 20hz is 75db (No usable range below 20hz) - the box is 2 cu ft

    I modeled the 15" driver with the 15" PR at full mass - with 1 signal watt - 80hz is 85db, 50hz is 86db, 30hz is 82db, 20hz is 79db, 16hz is 75db - the box is 4.5 cu ft - so it is a combined 1 cu ft bigger than my box

    My box is a little different as the PR will technically be slot ported. So it may in essence have a lower response? Not sure...

    Either way - based on these results and maybe a little eqing with something like the SMS 1 I may have a stellar subwoofer

    This is almost identical to the SVS Ultra - in the 10hz ported configuration
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • treitz3
    treitz3 Posts: 19,135
    edited December 2010
    So, did you want to borrow the SMS-1 when this project is complete?

    {EDIT:} Nevermind, I'll call you....
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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  • FTGV
    FTGV Posts: 3,649
    edited December 2010
    Vr3MxStyler2k3 wrote: »
    Thanks!

    I downloaded Unibox and the problem remains - how do you model two drivers in the same enclosure at one time? This is silly that someone has not thought of this.

    You can in WinISD and I would expect you could Unibox aswell.
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  • VR3
    VR3 Posts: 28,741
    edited January 2011
    Today has been very productive so far ---

    Picked up a plunge router... already attached a second layer of MDF to the bottom and the back - now going to attach a layer to front and cut those two holes ohhhh yeah!

    Pics to follow!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 28,741
    edited January 2011
    Pics!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • danz1906
    danz1906 Posts: 5,144
    edited January 2011
    Looking Good!!!
    Linn AV5140 fronts
    Linn AV5120 Center
    Linn AV5140 Rears
    M&K MX-70 Sub for Music
    Odyssey Mono-Blocs
    SVS Ultra-13 Gloss Black:D
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  • VR3
    VR3 Posts: 28,741
    edited January 2011
    Thanks man!

    I trying to think of ways I can integrate the base in it a little differently than Brian did...

    Decisions decisions
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • greyford1979
    greyford1979 Posts: 749
    edited January 2011
    Looking good so far man! Bet it's getting tougher to lug that thing around lol.
    I love animals, they're delicious!
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