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Thread: bulding sub

  1. #1

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    Default bulding sub

    i am starting my sono sub project i have a 18 inch tube 5 feet long and i am tuneing to 16 hz i am using a tempest and the encloser has 25o leters i think prety sure here is what i have questons about is to use 1 4 inch flaired port or 2? and should i stuff it with polly fill and how much? here is what i have so far i have decided to make a tabble for behind my couch i am raising the tube 3 inches off the floor. this is huge i dident think it would be this big ron did you go with the 250 plate amp?
    Gonzo's World
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  2. #2

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    Hey Ron Charge him for your sub plans. Sounds like the same one you built. ;)
    PS3 and HD Front Projection, life is good. Too bad Blu-Ray and the PS3 are already obsolete.....

  3. #3
    Spaceman Spiff
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    Yep, 18" x 60" is 250 L.

    Sorry, but I cannot lend a hand with the porting. I did not do any research in that area as I want sealed.

    As for polyfill. If you port your sonosub, do not stuff the sub, just line the tube. If it is sealed, then you want to stuff it. You want the driver to 'think' it is in the largest enclosure possible.

    HERE is a link to a lot of different sonosub projects. I went thru most of these to get ideas for mine. Check'em out, they will help.

    You want to go a least 6" off the floor, unless your driver will be on the top of the tube. Or, are you planning on laying it horizontal?

    You can go smaller. My sonosub is only 177L, if the tube is too big, shrink it.

    HERE is a volume calculator.

    ...and yes, I am using a 250w plate amp.

    That'll be $60.00 please:)



    Peace Out~:D
    Last edited by Ron-P; 06-01-2002 at 09:42 PM.
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    Ron, you get a chance to find the part number of your amp? Thanks
    Some polks and stuff

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    hey ron the check is in the mail lol i am makeing a tabble out of mine i also have a left over 3 ft piece of the tube where i got it they charge by the foot and the guy who cut it said i could keep the scrap. here is a pic of the first mock up of the ends i am going to use good wood to do the trim and i am going to but a high gloss black in the trim and a mat on the in fill
    Gonzo's World
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    i forgot to atach the pic
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    Gonzo's World
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    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

  7. #7
    Spaceman Spiff
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    Looks great. Let us know how she puts out.

    Part # 50-6281 (MCM Electronics)


    Peace Out~:D
    If...
    Ron dislikes a film = go out and buy it.
    Ron loves a film = don't even rent.

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    Ron, where in socal did you find your sonotube? I tried a HD, hard enough finding someone to ask where stuff is. Also what jig did you use? Thanks
    Some polks and stuff

  9. #9
    Spaceman Spiff
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    I picked up the sonotube at White Cap. You can find them online at whitecapdirect.com. They are in Santa Ana.

    I have a Bosch Progressor that I used to cut the inner circles with and then I bought the outer plywood circles at Home Depot.


    Peace Out~:D
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    Ron dislikes a film = go out and buy it.
    Ron loves a film = don't even rent.

  10. #10

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    Oh, your pictures fooled me then
    Some polks and stuff

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    i cut my circles with a jig saw and smothed it out with my roughter makeing the edges square my jig saw is old and cant cut at a right angle
    Gonzo's World
    BenQ 8700+
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    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

  12. #12
    Spaceman Spiff
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    You got a camera so we can see progress? Share it man.


    Peace Out~:D
    If...
    Ron dislikes a film = go out and buy it.
    Ron loves a film = don't even rent.

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    Ron,

    The circles you got, 3/4" plywood? Was it the 24" ones from Home Depot? Would it matter much if I went with 5/8 particle board instead of plywood?
    Some polks and stuff

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    I will say one thing about that 5/8 particle board at home depot....it chips/cracks/splits when you try to put a screw or nail through it....

    Ron did an MDF/Plywood sandwhich I believe...I'd stay along those lines....

    Cheers,
    Russ

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    Cool, thanks!
    Some polks and stuff

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    Spaceman Spiff
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    Do not use particle board. That stuff sucks like a hoover. I did use the pre-cut 24" from Home Depot.


    Peace Out~:D
    If...
    Ron dislikes a film = go out and buy it.
    Ron loves a film = don't even rent.

  17. #17

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    here is a pic of the work so far this is the port endcap i am using 2 4 inch ports i have the first one cut out working on the seccond and the input cup but i havent decided on a single or dubble input.
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    Gonzo's World
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    115in screen
    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

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    and here is a pic of the other side it is allmost done just have to atach the driver and put a cpuple of coats of paint on it and buld the trim the other trim is just a mock up and i am going to paint it gloss black
    Attached Images  
    Gonzo's World
    BenQ 8700+
    115in screen
    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

  19. #19

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    Ron & goinggonzo, how thick are your sonotubes? THanks! I may get lucky with just using the precut circles HD sells, they have em in 24" & 23 3/4" 3/4" thick plywood
    Some polks and stuff

  20. #20
    Spaceman Spiff
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    The sonotube runs at just about 1/4" thick.

    Do not use plywood for the inner cap, it is too porous, too many air pockets. But, it works great for the outer cap.

    Look'in great ganzo.


    Peace Out~:D
    If...
    Ron dislikes a film = go out and buy it.
    Ron loves a film = don't even rent.

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    oh? is the mdf or other part. board ok for inner caps then?
    Some polks and stuff

  22. #22
    Spaceman Spiff
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    Yes, use the 3/4" MDF (Medium density fiber board) This stuff is dead, voidless material. Home Depot sells it in 4x8 sheets for about $20.

    Also, always predrill into the MDF first. Never just slam in a nail or screw, the stuff will fragment apart.


    Peace Out~:D
    If...
    Ron dislikes a film = go out and buy it.
    Ron loves a film = don't even rent.

  23. #23

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    Cool, thanks. There's a whitecap near by, they told me to call back today to see if it's in stock.
    Some polks and stuff

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    i am using 2 layers of 3/4 mdfb there is 1 layer in the tube and the other layer is the face for the sides of the tabble i just got dune with the seccond port and installed them i had ti use 4 layers of constructon paper to make the tube between the flaried ends i can allways re do them if i can fund the right tube
    Gonzo's World
    BenQ 8700+
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    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

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    updated pics this is the dual 4 inch ports installed i have to do some sanding and painting
    Attached Images  
    Gonzo's World
    BenQ 8700+
    115in screen
    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

  26. #26

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    Ok guys I finally found where I can get some tube. FRIGGIN Missouri an hour and a half away! So screw the tube! So I have yet another question on "what is your opinion". Which would be better for HT purposes a Velodyne CHT15 or two Polk PSW450's. I know the Velodyne is supposed to do 23 cycles as opposed to the Polks 35 cycles. So the real Q is. How much difference do those 12 hertz make? The Polk's would get alot louder (I believe). The Velo would just get LOW I mean like RON-P low. So which would you guys buy?????? Cost difference is not something I am worrying about. Polk's $900 Velo $700. So what's up?
    PS on yet another side note I'm getting trashed :D
    Why do I always do it on a Sunday? That is a question I would really like to know. Is it because work starts again tommorow? Is it because I am winding down from the weekend? HMMM

  27. #27

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    the 15 velo would give a bit more punch down low hence it is beter suted for ht the 450's would be more musical. to find sono tube call constructon suply near you and ask for sono tube and if they dont have it ash if they can recomend some one who sells it near you that is how i got mine took me a nour to find a place ps 18 inch tube wont fit throgh a pass throgh on a gm mid sized car like the alero or grand am
    Gonzo's World
    BenQ 8700+
    115in screen
    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

  28. #28

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    I agree with, Ganzo, for home theater go with the 15" velo. If it were for tunes, I would go with the Polks.

  29. #29

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    my 24" x 24" sonotube barely fit in my front seat. The sonotubes they sold, some looked like missle silos :)
    Some polks and stuff

  30. #30

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    when i got mine there was a storage room with tubes up to the celong they were 14 ft long and they had them in every size dlew what driver are you going to use in your sub?
    Gonzo's World
    BenQ 8700+
    115in screen
    PS3,X-Box 360 and Wii
    Sunfire Theater Grand III
    ADCOM GFA-7607
    four avalanch 18 subs 26.12l of displacement
    Crown xti 4000

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