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Time to make some sawdust.

post #1 of 34
11/3/11 at 7:37pm
Thread Starter 
I have been waiting forever for CSS to release their new SDX 15 II..now the date has been pulled back to the beginning of 2012.

I know their 15 incher is give or take the same diameter as my 15 inch Tempests.. if more I can modify the box to accommodate the SDX15 II...

So I wanted something that doesn't just have a square look and won't break the bank book..

PassingInterests Howitzer project got me thinking...and also gave me some ideas..


I wanted something thats about 8 cubes and houses 2 drivers.. to net me at least right under the 7 foot for 3.5 ft. per driver sealed..

These are some pics ... that I started this week..









more to come later....
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post #2 of 34
11/3/11 at 8:00pm
holy moley...those are some overkill routed braces. :-)

nice choice of design and ply btw...will be lurking...
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post #3 of 34
11/3/11 at 9:55pm
What will happen to the THTs?

JSS
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post #4 of 34
11/3/11 at 11:27pm
Thread Starter 
Quote:
Originally Posted by maxmercy View Post

What will happen to the THTs?

JSS


Wife wants her closet space back... I put up an ad to give them away for free locally but no one wanted them... too bad they were good and even could have been better if I had more placement options than the one was stuck with.
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post #5 of 34
11/4/11 at 4:45am
Some local DJs or clubs may want them.....try the BFM forum's for sale section....

But I like the look of the new cabs....

JSS
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post #6 of 34
11/4/11 at 7:46am
Looking good. I hope you find a buyer for the THTs.
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post #7 of 34
11/4/11 at 6:21pm
Thread Starter 
I decided to clad the sides with 3/4" MDF, kerfed cut... so it can bend...


gonna fill up the kerfs with a couple of tubes of NoMoreNails later.. and cap the top and bottom as well as install another front.
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post #8 of 34
11/5/11 at 12:04am
Tuned in...

*grabs popcorn*
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post #9 of 34
11/5/11 at 10:49am
Thread Starter 
I managed to fill the screw heads and put on a coat of primer and cut the holes... BTW this project has cost me $20 so far the ply and mdf were packaging scraps from a huge machine we purchased at work.. hence the marks you see on the ply...




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post #10 of 34
11/5/11 at 11:17am
Nice way to save on costs and trees. I wish I wasn't so far away as I would be happy take the THTs and drop in my 2 original tempests that are still in sealed enclosures.
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post #11 of 34
11/5/11 at 11:34am
The cab's are looking good. How did you calculate the volume with the curved sides? I am working on something similar an the only way I could think to do it was build a model and fill it with styrofoam packing material. It worked obviously but I'm wondering if you knew simpler way?
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post #12 of 34
11/5/11 at 11:50am
^ Do you have access to autocad? I draw it up then use the area command, then multiply by the height. Somewhat approximate, but good enough.
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post #13 of 34
11/5/11 at 3:46pm
Quote:
Originally Posted by Kanaris View Post

BTW this project has cost me $20 so far the ply and mdf were packaging scraps from a huge machine we purchased at work..

Just when I thought this build was the coolest, you went and made it even cooler with that statement. Very, very nicely done, sir.
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post #14 of 34
11/5/11 at 4:46pm
Thread Starter 
Quote:
Originally Posted by PassingInterest View Post

Just when I thought this build was the coolest, you went and made it even cooler with that statement. Very, very nicely done, sir.

Thanks,but it's no where near your masterpieces...



I need some help with something.. if the cab contains two woofers and each is wired for 4 ohms then if I put a jumper to the middle red and black connectors and put the wire from my amp to the exterior connectors will I get 2 ohms total?

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post #15 of 34
11/5/11 at 4:57pm
I think that would be a series connection and would give you 8 ohms. If you want 2 ohms you want to run parallel which would be both reds to the one red connection on the amp and both black to the black connection on the amp.
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post #16 of 34
11/5/11 at 5:00pm
as you described, you will be putting the drivers in series. with series you add the impedance, so you will have 8 ohms net.
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post #17 of 34
11/5/11 at 5:02pm
definitely don't plug power into each of those connections then wire them together. that will fry your amp.

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post #18 of 34
11/5/11 at 5:17pm
Thread Starter 
My old brain is confused ,is this correct for total 2 ohms?

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post #19 of 34
11/5/11 at 5:25pm
Quote:
Originally Posted by Kanaris View Post

My old brain is confused ,is this correct for total 2 ohms?


Yes, but remember that is "nominal." At any given frequency, the impedance can be higher or lower. I'll let the experts elaborate or correct me.
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post #20 of 34
11/5/11 at 5:28pm
Thread Starter 
My ohm meter gives me 3 ohms..
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post #21 of 34
11/6/11 at 3:26am
Quote:
Originally Posted by Kanaris View Post

My ohm meter gives me 3 ohms..

Resistive and nominal?
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post #22 of 34
11/6/11 at 7:39am
Thread Starter 
I would think resistive as in resistance.
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post #23 of 34
11/6/11 at 11:09am
Quote:
Originally Posted by Kanaris View Post

My ohm meter gives me 3 ohms..

If that is for the two drivers in parallel, then you should get 6 ohms for each one seperately on your meter. It sounds like this was an unexpected reading, so I hope there's nothing wrong with your drivers or wiring. I'll let the experts take it from here.
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post #24 of 34
11/6/11 at 11:34am
Thread Starter 
Quote:
Originally Posted by PassingInterest View Post

If that is for the two drivers in parallel, then you should get 6 ohms for each one seperately on your meter. It sounds like this was an unexpected reading, so I hope there's nothing wrong with your drivers or wiring. I'll let the experts take it from here.

They got dual 8 ohm vc's I have them each wired parallel for a total of 4 ohms and then agian parallel them to get 2 ohms... my ohm meter gives me 3 ohms which is probably correct.
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post #25 of 34
11/6/11 at 4:12pm
Thread Starter 
I sprayed it with a black rubberized texture








I will take some measurements and post them tomorrow.

I am also making a dual opposed sub for my other two tempests..

Again I am using used MDF that I salvaged.. I installed hardwood on all the edges to strengthened the mdf..

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post #26 of 34
11/6/11 at 7:38pm
Very Nice!!!

JSS
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post #27 of 34
11/6/11 at 9:30pm
Thread Starter 
Dimensions are 24x22x36 (8.5 cu.ft.) minus about 1 1/2 for the drivers and ribbing.. plus I will be stuffing it with 20 pounds of pillow stuffing...




All sanded up and ready for me to install some arborite..


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post #28 of 34
11/7/11 at 12:10pm
Thread Starter 





This one will go next to the couch and it will be corner loaded..


Coincidentally, anyone know how to set up 2 subs with Audeyssy?
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post #29 of 34
11/7/11 at 12:56pm
Damn, you're fast!
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post #30 of 34
11/7/11 at 1:11pm
Quote:
Originally Posted by noah katz View Post

Damn, you're fast!

No kidding!!! That's the fastest I've seen anyone build here. WOW!

Kanaris,
I'm thinking about buying 2 Pi 18's and am wondering if you would/could build sealed cabs for me.
Since you're in Montreal and I'm on the south shore of Montreal.

How much would you charge?

Man are you good and FAST!!!!
Very impressive!
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AVS › AVS Forum › Audio › DIY Speakers and Subs › Time to make some sawdust.