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wo help...... thx (Read 5363 times)
phd5000
Ex Member



wo help...... thx
05/12/06 at 05:52:36
 
im planing on a wo box for my 2 polk mm2084 8"

http://www.polkaudio.com/caraudio/specs/mm2084/

i have built a few box's ( all sealed ) and have a ton of wood working experance so building this is not a prob but i dont really understand "tone porting" any help would be great.....
what would be best to run the woofers i have....

thx again  im a rookie on a mission Smiley
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« Last Edit: 05/12/06 at 06:54:19 by phd5000 »  
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J_Rock
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Re: wo help...... thx
Reply #1 - 05/12/06 at 07:00:21
 
I don't really understand your question?  Are you looking for what amp would work well?  Or perhaps how big you should make the WO?
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phd5000
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Re: wo help...... thx
Reply #2 - 05/12/06 at 08:10:28
 
ya waht size would be best......  for the speakers i have
i have allways just bult boxes to specs ( sealed ) i dont really understand the whole bandpass/porting  

here's the box i was going to build...
http://www.polkaudio.com/caraudio/subbox/subbox_plan.php?id=45&mesurements=stand...

but the wo looks better & probly sounds better
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« Last Edit: 05/12/06 at 08:17:11 by phd5000 »  
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phd5000
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Re: wo help...... thx
Reply #3 - 05/12/06 at 10:11:57
 
so i guess what my q is

1 what size  should i make my seald chamber
2 how would i "tune " this to 43 hz... im lost when it comes to this
thx again guys for any help
heres the specs from polk

Recommended Enclosure Sealed / Ported / Bandpass
Resonant Frequency 43 Hz
Qms 15.13
Qes .68
Qts .65
Vas 0.562 cu.ft./15.9 L
Bl 10.2 Tesla Meters
Sd 34.72 sq.in. / 224 sq. cm.
Xmax (linear) .709 in. / 18 mm.
Le 1.84 mH
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« Last Edit: 05/12/06 at 15:31:16 by phd5000 »  
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phd5000
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Re: wo help...... thx
Reply #4 - 05/13/06 at 04:18:17
 







time to cut some angles.... i have the back & 2 sides done..
i made it 36 x 24 it made the seald chamber .51 & the speakers call for .40 or .46 i got 2 numbers from 2 free programs so all start at .5 and work my way to under .40 to see waht sounds best..
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« Last Edit: 05/13/06 at 04:18:57 by phd5000 »  
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J_Rock
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Re: wo help...... thx
Reply #5 - 05/13/06 at 06:07:56
 
Sorry I could not get back to you, party at my friend's who is leaving for Iraq.

Your plan sounds best to me.  Remember to adjust the sealed chamber by adding or removing material(add a chunk of wood in there or take some out).  Moving the baffle will mess with the sound in a bad way...
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phd5000
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Re: wo help...... thx
Reply #6 - 05/13/06 at 08:30:47
 
no worrys man i got it right i think... we will find out in the next few days im hoping to have it screwed & glued by early morning  

i will make sure to add and not move anything around...


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gexter
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Re: wo help...... thx
Reply #7 - 05/13/06 at 17:27:51
 
[quote author=Mr.J_Rock  link=1147413156/0#5 date=1147496876]
Your plan sounds best to me.  Remember to adjust the sealed chamber by adding or removing material(add a chunk of wood in there or take some out).  Moving the baffle will mess with the sound in a bad way... [/quote]


DITTO.
moving the baffle back would be the worst mistake you could make.
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Jet-Lee
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Re: wo help...... thx
Reply #8 - 05/13/06 at 20:30:58
 
I'm looking at your drawing and noticed, on some of the walls you put the board on one side of the line, and in other spots you did the opposite. It looks like the second segment of your horn is HUGE incomparison to the first (throat) segment.

Does anyone else understand what I'm trying to say? Look closely at his board placement in relation to his lines, in the 2nd picture.
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phd5000
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Re: wo help...... thx
Reply #9 - 05/13/06 at 20:55:49
 
yes i noticed that last night
it looked funny to me thats why i painted it so i could see with  out all the lines it was cunfusing me now that its painted i see witch 2 pices where mis marked so witch one should i go with or should that line be center? i did not see any detale about this ini the plans.....

thx guys
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« Last Edit: 05/13/06 at 20:58:46 by phd5000 »  
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gexter
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Re: wo help...... thx
Reply #10 - 05/13/06 at 21:55:45
 
Have not been in a WO for awhile but I think Jets right.
did you place the boards on the wrong side of the line?
or wrong measurements.
could be just my eyes and the angle.
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J_Rock
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Re: wo help...... thx
Reply #11 - 05/14/06 at 01:11:13
 
Put the boards of the triangle on the outside of the lines.  

The boards for the horn flares directly across from the triangle sides should be on the inside of the triangle.

The 24 x 36 version's first bend looks weird compared to the 36 x 36 version.
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J_Rock
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Re: wo help...... thx
Reply #12 - 05/14/06 at 01:14:27
 
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Jet-Lee
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Re: wo help...... thx
Reply #13 - 05/14/06 at 04:20:40
 
^^^ wut hee sed ^^^
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phd5000
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Re: wo help...... thx
Reply #14 - 05/14/06 at 09:32:41
 
thx guys,
cuz of this i did not get it together today as planed we had grand opening  at are shop so i was to damn busy i will get on this in the morning i redrew out the pieces where there gonna be.. all upload pics in the moning... thx again fior all the help
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