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Building an eight inch WO ( PIC'S ) (Read 8709 times)
Yok666
Ex Member



Building an eight inch WO ( PIC'S )
08/14/06 at 19:28:38
 
I plan to build a 24" x 36" WO using Infinity 850W's. I want to fit the box under the package tray of a Crown Vic. The only problem is that the height in the tray area is only 11 1/4" which means that I will have side panels only 9 1/2" high. Will the loss of a half an inch compromise the performance of the box and is the 850W a good choice for this application. TIA


 Matt
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« Last Edit: 09/03/06 at 21:52:11 by Yok666 »  
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J_Rock
Ex Member



Re: Building an eight inch WO
Reply #1 - 08/14/06 at 22:57:02
 
Infinity makes some great subs, although I have no experience with their 9 inch version, I can recommend them as a companys.

As far as the height- make it as large as you can fit and you shouldn't have a problem.
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Yok666
Ex Member



Re: Building an eight inch WO
Reply #2 - 09/03/06 at 21:48:59
 
Well I have almost completed the box, I'm now just waiting for the drivers to arrive so I can finish it off. Here are some pics.






I was able to make the box out of only 1 4' X 8' piece of 3/4" MDF board. I had the store do all of the major cuts and cut the rest using a Skill saw with a 40 tooth carbide blade. The box is really heavy. Once the drivers are in I don't think anyone will be carting it away without help.
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Yok666
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #3 - 09/05/06 at 14:06:27
 
I have another question. I just measured the sealed volume behind the driver and I came up with a volume of .61 cubic feet. When I checked the speaker spec's I find the recommended box size to be .35 cubic feet for a sealed enclosure and .54 cubic feet for a bandpass enclosure. Is the actual volume close enough to the recommended value or should I reduce the box volume? The speaker spec's are; Qts .42, Vas .61 and Fs 28,8. For the record I am SQ person, I leave the SPL to my son.
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Lee in Arkansas
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Re: Building an eight inch WO ( PIC'S )
Reply #4 - 09/05/06 at 14:33:35
 
Add bracing to bring the volume down. Don't forget to subtract the volume of the speaker from the chamber volume, as well.
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60ndown
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Re: Building an eight inch WO ( PIC'S )
Reply #5 - 09/05/06 at 15:36:38
 
[quote author=Yok666  link=1155583718/0#3 date=1157461587]I have another question. I just measured the sealed volume behind the driver and I came up with a volume of .61 cubic feet. When I checked the speaker spec's I find the recommended box size to be .35 cubic feet for a sealed enclosure and .54 cubic feet for a bandpass enclosure. Is the actual volume close enough to the recommended value or should I reduce the box volume? The speaker spec's are; Qts .42, Vas .61 and Fs 28,8. For the record I am SQ person, I leave the SPL to my son. [/quote]

i would try it the way it is first, and if its a little 'boomy' then put some blacks of wood in the sealed area to make the sealed volume closer to munfacturers specks, but i dont think you will need to, the larger sealed area my just allow the drivers to play lower and louder with less power.
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Yok666
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #6 - 09/07/06 at 00:49:32
 
Thanks for the response. Lee you made a good point I had forgotten to include the speaker. It looks like it will work out. I also added a few pieces, after reading a post by DirtDawg in another thread, to smooth the sharp corners in the horn. (See Pic)



I also radiused the sharp edges and the mouth of the horn. All I need now is my drivers.
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rock4016
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Re: Building an eight inch WO ( PIC'S )
Reply #7 - 09/27/06 at 16:30:51
 
Did you get your drivers yet? If so, how does it sound?
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Yok666
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #8 - 10/08/06 at 16:08:49
 
I just got the drivers a few days ago and I have just installed them. I haven't received my threaded inserts yet so I am testing the speaker without the top on flipped over on the rug in the living room. So far the speaker is sounding great. I have been noticing the break in of the drivers as I'm listening, every so often I have to adjust the subwoofer volume down as the drivers free up. Overall so far so good.
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« Last Edit: 10/08/06 at 16:10:06 by Yok666 »  
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Yok666
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Re: Building an eight inch WO ( PIC'S )
Reply #9 - 11/21/06 at 22:31:14
 
Well I finally got the box finished three weeks ago. Installing 50 6mm threaded inserts to hold the top on was a royal pain in the butt. The end result looks good though, but it sounds even better. I have been testing the sub in my home theater system. Yesterday I watched Master And Commander and I was amazed at the tight solid hard hitting bass that comes out of this speaker. It just blows my 12 inch 350 watt ported cube out of the water.  :D The final consensus is that the cube has to go. My only remaining question is whether to build a WO32 or another WO (10" this time) for the home theater. I can't wait to get this in the car. I will have some pictures later.
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« Last Edit: 11/23/06 at 18:39:19 by Yok666 »  
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gexter
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #10 - 11/22/06 at 03:32:26
 
Nice build.
A WO has more output and better for HT in my opinion.
But who am I to talk I just finished  a 12" WO32 because the scrap lumber I had was only 24x33.
Yes I was bored! If the lumber was bigger it would have been a 36x36 WO
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hannes
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #11 - 11/23/06 at 18:15:41
 
Gexter:
any comments on the 12" WO32? Everything as expected,
i.e., clean bass, just a tad more output than the 10" version?

Sorry for thread-hijacking, but I am interested in a tweaked
WO32...

Bye,
 Hannes
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Yok666
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #12 - 12/12/06 at 23:43:23
 
Here are a couple of pictures of the WO with the drivers mounted.  



I painted it blue because everyone else uses black.



Plus it matches my interior.  

Smiley
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Jet-Lee
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #13 - 12/13/06 at 13:38:20
 
[quote author=Yok666  link=1155583718/0#13 date=1165967003]
I painted it blue because everyone else uses black.
Smiley [/quote]
That's awesome!!!

Looks great man! How's it sound?
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60ndown
Ex Member



Re: Building an eight inch WO ( PIC'S )
Reply #14 - 12/14/06 at 02:30:32
 
wo is great wo32 is unbelieveable. you have a wo, you dont have a wo32. the wo32 does everything the wo does and much more.


(built to plans of course not modded)    ;)
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