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WO for some 18" bad boys (Read 13620 times)
Matthew
Ex Member



Re: WO for some 18" bad boys
Reply #60 - 11/26/06 at 20:37:53
 
Did you scale everything?  Hehe!   ???

10" WO = 36" x 36" x 13.5"

Upscale:

    18 / 10 = 1.8
    1.8 - 1 = 0.8
    0.8 * 100 = 80%

36" + 80% = 64.8"

13.5" + 80% = 24.3"

Oh and:

.75" MDF + 80% = 1.35" = heavy*

It seems to me that if you don't increase the material thickness than the opening in the throat will be messed up.  Yes, the center or tip of the panel in the throat will be X inches from the corner of the box, but it's width will not be to scale and will change something.  Also, the bracing in the rear chamber won't take up a properly scaled volume and will change things yet again.

64.8" x 64.8" x 24.3"  with 1.35"

*BONZAI

Well, that's how I would try it anyway.   Kiss

This box would be helluva tough, but not as tough as he, Mr. T!
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musgofasa
Ex Member



Re: WO for some 18" bad boys
Reply #61 - 11/26/06 at 21:30:40
 
Hey EZ check out a drawing I found today linking from a European Pro Sound website. Thought this was rather fun


BTW it is for 18" subs
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mrezstreet
Ex Member



Re: WO for some 18" bad boys
Reply #62 - 12/05/06 at 01:23:15
 
wont work...my table saw and tape only have in...no cm .....and the sun shines on the same subs all the time. i wanna try a bp.....i have a 12 coming that is very good buy and i want to play with a bp for it.....for my 88 astro cargo i just got. "cargostro" what type of tuning would you go with and is winisd a good program for bp? im ganna look at the planys you found. i might just run a bunch of $25 12" Smiley
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mrezstreet
Ex Member



Re: WO for some 18" bad boys
Reply #63 - 12/05/06 at 01:25:06
 
me like BIG ports....that little port is cute...what did they use the box for? how mugh power did they through on it?
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Adrian D.
Ex Member



Re: WO for some 18" bad boys
Reply #64 - 12/06/06 at 17:13:36
 
[quote author=mrezstreet  link=1160835651/60#62 date=1165281795]wont work...my table saw and tape only have in...no cm .....and the sun shines on the same subs all the time. i wanna try a bp.....i have a 12 coming that is very good buy and i want to play with a bp for it.....for my 88 astro cargo i just got. "cargostro" what type of tuning would you go with and is winisd a good program for bp? im ganna look at the planys you found. i might just run a bunch of $25 12" Smiley [/quote]
holeee shiznit, is it that difficult to convert to inches ?  :-/
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mrezstreet
Ex Member



Re: WO for some 18" bad boys
Reply #65 - 12/07/06 at 02:45:34
 
it was for fun.... i want to try something for the 18 other that the slot port....mabe a folding horn.....most ones i have come across dont look too good for a van....but i dont really know  ??? if i find a plan that will work ill build it and bass will come! Smiley
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musgofasa
Ex Member



Re: WO for some 18" bad boys
Reply #66 - 12/07/06 at 11:59:44
 
That cab is some sort of Bass Bin for clubs. There weren't any comments about it as far as driver, power, tuning or anything like that. All I could find was that it was indeed designed for 18" subs. I thought it was neat that it is loaded that way. Think about the size of those ports when you say small though. 20" tall by 2.5" or so (haven't done the conversion, but there are calculators all over the net for that).

Take a look at the thread titled "8 Fusion 12s" that guy is doing band pass in an Astro and we have some pretty cool drawings in that thread so far too. One or two of them are not particularly BP oriented, but close. It is a fine line once the enclosure gets to a certain size. I am still trying to figure out that 3 chambered BP the guy did with a bunch of 12s over on termpro too. That thing is pretty wicked.
Check you later man!

Robert
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mrezstreet
Ex Member



Re: WO for some 18" bad boys
Reply #67 - 12/08/06 at 21:08:54
 
mabe ill try it and put huge slot ports that have a flair on it Smiley
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nubz69
Ex Member



Re: WO for some 18" bad boys
Reply #68 - 01/24/07 at 03:21:16
 
Your math is off
piR2 = 3.1415(5)srq = 78.5 sq inches or .55 sq ft.
piR2 = 3.14.5(9)sqr = 254.46 sq inches or 1.77 sq ft.

that means that to scale the enclosure to go from a 10" to a 18" you need to increase the sizes 3.2 times.

in other words your 36X36" box just became 115X115".  I hope you have a semi to put this in.

[quote author=Matthew  link=1160835651/60#60 date=1164573473]Did you scale everything?  Hehe!   ???

10" WO = 36" x 36" x 13.5"

Upscale:

    18 / 10 = 1.8
    1.8 - 1 = 0.8
    0.8 * 100 = 80%

36" + 80% = 64.8"

13.5" + 80% = 24.3"

Oh and:

.75" MDF + 80% = 1.35" = heavy*

It seems to me that if you don't increase the material thickness than the opening in the throat will be messed up.  Yes, the center or tip of the panel in the throat will be X inches from the corner of the box, but it's width will not be to scale and will change something.  Also, the bracing in the rear chamber won't take up a properly scaled volume and will change things yet again.

64.8" x 64.8" x 24.3"  with 1.35"

*BONZAI

Well, that's how I would try it anyway.   Kiss

This box would be helluva tough, but not as tough as he, Mr. T! [/quote]
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