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post #1 of 34 Old 11-03-2011, 07:37 PM - Thread Starter
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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 Old 11-03-2011, 08:00 PM
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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 Old 11-03-2011, 09:55 PM
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What will happen to the THTs?

JSS
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post #4 of 34 Old 11-03-2011, 11:27 PM - Thread Starter
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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 Old 11-04-2011, 04:45 AM
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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 Old 11-04-2011, 07:46 AM
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Looking good. I hope you find a buyer for the THTs.
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post #7 of 34 Old 11-04-2011, 06:21 PM - Thread Starter
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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 Old 11-05-2011, 12:04 AM
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Tuned in...

*grabs popcorn*
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post #9 of 34 Old 11-05-2011, 10:49 AM - Thread Starter
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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 Old 11-05-2011, 11:17 AM
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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 Old 11-05-2011, 11:34 AM
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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 Old 11-05-2011, 11:50 AM
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^ 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 Old 11-05-2011, 03:46 PM
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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 Old 11-05-2011, 04:46 PM - Thread Starter
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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 Old 11-05-2011, 04:57 PM
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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 Old 11-05-2011, 05:00 PM
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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 Old 11-05-2011, 05:02 PM
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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 Old 11-05-2011, 05:17 PM - Thread Starter
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My old brain is confused ,is this correct for total 2 ohms?


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post #19 of 34 Old 11-05-2011, 05:25 PM
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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 Old 11-05-2011, 05:28 PM - Thread Starter
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My ohm meter gives me 3 ohms..

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post #21 of 34 Old 11-06-2011, 03:26 AM
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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 Old 11-06-2011, 07:39 AM - Thread Starter
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I would think resistive as in resistance.

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post #23 of 34 Old 11-06-2011, 11:09 AM
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Quote:
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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 Old 11-06-2011, 11:34 AM - Thread Starter
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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 Old 11-06-2011, 04:12 PM - Thread Starter
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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 Old 11-06-2011, 07:38 PM
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Very Nice!!!

JSS
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post #27 of 34 Old 11-06-2011, 09:30 PM - Thread Starter
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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 Old 11-07-2011, 12:10 PM - Thread Starter
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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 Old 11-07-2011, 12:56 PM
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Damn, you're fast!

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post #30 of 34 Old 11-07-2011, 01:11 PM
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Quote:
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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!

My Build Thread
Equipment Speakers:
3x 1099's for LCR duty
4x Fusion 8's for surround duty
8x subs: 4x FTW21's and 4x SI18's
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