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12" in a 36x24 (Read 4569 times)
J_Rock
Ex Member



Re: 12" in a 36x24
Reply #15 - 04/23/06 at 16:12:50
 
If I were you, dl winISD pro from linear team.

Plug in the driver parameters in the correct order(look in help tutorial)

Pick the driver that models best in a 40hz 4th order enclosure with chamber sizes equal or smaller than the 24 x 36 WO.

As a rule I don't exclude one type of woofer from anything I do, i just choose the best one I can afford.

~side note~
Those daytons are nice, I just got a pair of the high fidelity 10s in a trade for some cabinets, lower power handling than the HO, but higher sensitivity and larger Xmax makes them my choice:
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=295-460
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Adrian D.
Ex Member



Re: 12" in a 36x24
Reply #16 - 04/23/06 at 16:17:32
 
JRock, are you gonna give'em a try in a db or a wo ?
8bit-ash, if you are considering the daytons, inform yourself about the taxes because they can be pretty heavy.
EDIT :
gex, jet's modded wos are similar to ported boxes.
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« Last Edit: 04/23/06 at 16:20:59 by adi_ro »  
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8bit-ash
Ex Member



Re: 12" in a 36x24
Reply #17 - 04/23/06 at 16:43:32
 
Yep i've had troubles finding a 10" pro audio driver up to doing the job.  Infact I havnt found one.  
Another reason for wanting to use a 12" was because someone I know was able to make me up a couple to order that have a very nice spec.

So for winisd  I calculate the front chamber by measuring the volume of the front WO chamber which i think is about 19l on the 24" version.  then set the tuning to 45hz. Do I leave the port info alone?
Then work out the best rear chamber.
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Adrian D.
Ex Member



Re: 12" in a 36x24
Reply #18 - 04/23/06 at 16:53:01
 
you have to look only at the SEALED chambers. the front chamber on the wo is the "compression" chamber.
just sim a 4th order, tuned @ 40hz, and write down the size of the sealed chamber. then compare it to the sealed chamber on the wo
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« Last Edit: 04/23/06 at 16:54:36 by adi_ro »  
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8bit-ash
Ex Member



Re: 12" in a 36x24
Reply #19 - 04/23/06 at 19:15:29
 
cool.  tried that with an alpine type r, eminence omega pro and kappa pro and i'm not impressed with the graph on any of them.   Guess i'll just have to make the thing and see what happens.
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Adrian D.
Ex Member



Re: 12" in a 36x24
Reply #20 - 04/24/06 at 04:57:43
 
bulid the thing, put 2 good 10s in it, throw decent power in and forget about it Kiss
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8bit-ash
Ex Member



Re: 12" in a 36x24
Reply #21 - 04/25/06 at 14:22:33
 
one more quick question for the resident WO experts before I go choppin wood.

I cut the inside panels 14" as originally I was gonna fit 12's.  Since its a 24" version i'm building would it be possible to increase the sealed chamber and front chamber by leaving the panels 14" for a 10" driver,  but tapering the horn mouth down to 12"?  
Effectively would that mean that the only difference is a shorter horn. Or does this also mess up the suitable volume of the horn?
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Adrian D.
Ex Member



Re: 12" in a 36x24
Reply #22 - 04/25/06 at 14:31:58
 
all i can say is that steve said not to move the baffle back because the box would get boomy. this would mean a decrease in the sealed volume and an increase in the compression chamber.
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Jet-Lee
Ex Member



Re: 12" in a 36x24
Reply #23 - 04/25/06 at 14:39:58
 
[quote author=Adrian D.  link=1145737888/15#16 date=1145805452]EDIT :
gex, jet's modded wos are similar to ported boxes. [/quote]
Yup. That's how they were modeled in WinISD. They performed great, over their replacements. Expecting bigger numbers in the future, with only power modifications.

8bit-ash, be sure to post pics of the build!
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8bit-ash
Ex Member



Re: 12" in a 36x24
Reply #24 - 04/25/06 at 18:08:59
 




cut the mitres this evening.  nice and easy as they were nearly all the same.

Its still 15" tall at the mo so need to decide tonight if i'm gonna cut it down for 10's or risk it and try 12's ???

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J_Rock
Ex Member



Re: 12" in a 36x24
Reply #25 - 04/26/06 at 00:57:51
 
If youwant to cut it down, just cut everything to 12 inches instead of 14.

unless you want 12s with a 10" horn.  In which case, just slam em in there you can fit mot 12s in a 12 x 12 piece, since the cutouts are generally 10.5 or so.
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