Started dual CSS SDX12 - XBL^2 12" Subwoofer Build. - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 23 Old 04-02-2018, 09:59 PM - Thread Starter
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Started dual CSS SDX12 - XBL^2 12" Subwoofer Build.

Here are a few pics of my dual 12" subwoofer build. The box is 2.6 cubic feet made out of 3/4" ply with a double front baffle. I left off tonight working on the bracing.
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post #2 of 23 Old 04-02-2018, 10:21 PM
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Quote:
Originally Posted by DaveFred View Post
Here are a few pics of my dual 12" subwoofer build. The box is 2.6 cubic feet made out of 3/4" ply with a double front baffle. I left off tonight working on the bracing.
Very cool build.

As a woodworker I always tend to look at the background of pictures at peoples shops. You are a true woodworker, every horizontal surface is covered with something!
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post #3 of 23 Old 04-02-2018, 10:31 PM
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@PsychoM3

'As a woodworker I always tend to look at the background of pictures at peoples shops. You are a true woodworker, every horizontal surface is covered with something!"

and that's why most of my equipment is on wheels . . .

most of the driveway surface is still pretty much available . . . . only takes a few minutes . . .

and the milk crates . . . pure CLASS!

I've hoarded up to about a dozen - you never know . . . when . . .
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post #4 of 23 Old 04-03-2018, 04:42 AM
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That sawstop table saw says enough lol.

Cool build, any idea on output?
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post #5 of 23 Old 04-03-2018, 05:38 AM
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I had forgotten about CSS as a company. I wonder how come they don't get into larger sub manufacturing; there stuff has always looked high quality. For a 12", that thing looks like a monster!

What brand of parallel clamps are those?
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post #6 of 23 Old 04-03-2018, 06:57 AM
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I still love small but mighty drivers, and I was real close to getting a pair of these before I went with my PSI 12s two years ago. I know CSS had some great prices on these in February as they were bringing themselves back online, and I sure was tempted!
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post #7 of 23 Old 04-03-2018, 02:45 PM - Thread Starter
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Quote:
Originally Posted by dtsdig View Post
I had forgotten about CSS as a company. I wonder how come they don't get into larger sub manufacturing; there stuff has always looked high quality. For a 12", that thing looks like a monster!

What brand of parallel clamps are those?
Gross Stabil parallel clamps. Bessey bought them out about 10 years ago, and they became the "new" Bessey.

David.
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post #8 of 23 Old 04-03-2018, 03:01 PM
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Quote:
Originally Posted by JCJetta View Post
I still love small but mighty drivers, and I was real close to getting a pair of these before I went with my PSI 12s two years ago. I know CSS had some great prices on these in February as they were bringing themselves back online, and I sure was tempted!


The pre order price was great I wish I would of bought two of these guys on Facebook are saying really good things about these drivers. Plus side to these is they don’t need a big box.

Awesome build here definitely following it.
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post #9 of 23 Old 04-03-2018, 03:02 PM
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Nice use of biscuit joints!
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post #10 of 23 Old 04-03-2018, 06:47 PM
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looks cool. i have 2 CSS Sd12's, about 7 years old, like new, kinda.
in my old home, a concrete condo, they hit 119db, 20 hz, at my chairs.
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post #11 of 23 Old 04-03-2018, 07:27 PM
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Nice build and workshop

Looks like a great build and I will admit to admiring the quality of the tools in your workshop! (SS and Festool)

Following your progress as I am not ready to start building my speakers until I get my theater room completed, but getting close and starting to research ideas.

Thanks for sharing!
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post #12 of 23 Old 04-06-2018, 09:08 PM - Thread Starter
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Here is how I decided to connect the front and rear baffle. The dowels will be glued and screwed into "pocket blocks". The interior braces are biscuited to the sides. The kreg screws are really there to clamp the sides to the braces while the glue dries. The dowels are also glued and screwed to the braces. Should be a very strong box and it does not weigh very much at all.

Looking at it though, I think I will add a 5th dowel at the bottom of the circle tomorrow.
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post #13 of 23 Old 04-12-2018, 07:09 PM - Thread Starter
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Glued on one baffle tonight.

Should be braced enough
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post #14 of 23 Old 04-12-2018, 07:58 PM
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Quote:
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Glued on one baffle tonight.

Should be braced enough
Uh....yuh think? lol

This is going to be a sweet sub. Those drivers look noice!

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post #15 of 23 Old 04-22-2018, 09:32 PM - Thread Starter
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Here are some updates shots of the cabinet. I resawed some cherry to make 3/32" veneer and covered three sides of the cabinet. Will post more as I go along.
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post #16 of 23 Old 04-24-2018, 05:34 AM
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The Cherry looks great! I love resawed (thick) veneer, it's what I did on my 1099s with the Walnut. These are going to be beautiful!
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post #17 of 23 Old 04-24-2018, 09:13 PM - Thread Starter
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One of the most difficult parts of any woodworking project, speakers or otherwise, is how to finish it. Brushed finishes often turn out badly. Gloss poly looks like saran wrap. Spraying is not practical for most people.

A finish I have used again and again is a home made wiping varnish (called a long oil varnish due to its heavy oil content).

It is a mix of 1/3 satin oil poly, 1/3 turpentine and 1/3 boiled linseed oil.

Anyone can achieve a wonderful finish with this mixture.

Brush the mixture on. Wait ~30 minutes. Wipe it off with clean rag. If you are using a porous wood like oak, you should go back 1-2 hours later and wipe off any that bled out of the pores.

Repeat 2 more times, lightly sanding with 220g between coats. Allow 24 hours between coats for drying/curing.

That's it.

I have also attached a photo of my zebra wood and walnut desk I finished with the same process so you can see the finished look.

*Note* *Note* *Note* Dispose of rags safely. Boiled Linseed Oil is a "drying oil" and generates heat as it cures. If you ball up the rag and toss it in the corner, fully expect it to catch fire! I hang my rags in the backyard until they are stiff and dry, then dispose of them.
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post #18 of 23 Old 04-24-2018, 09:21 PM
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While my DIY subs are hidden behind speaker cloth panels out of shame, I can still appreciate someone with the skill and patience to do it right.
Nice work.
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post #19 of 23 Old 04-25-2018, 10:52 AM
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post #20 of 23 Old 04-25-2018, 12:12 PM
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Quote:
Originally Posted by DaveFred View Post
One of the most difficult parts of any woodworking project, speakers or otherwise, is how to finish it. Brushed finishes often turn out badly. Gloss poly looks like saran wrap. Spraying is not practical for most people.



A finish I have used again and again is a home made wiping varnish (called a long oil varnish due to its heavy oil content).



It is a mix of 1/3 satin oil poly, 1/3 turpentine and 1/3 boiled linseed oil.



Anyone can achieve a wonderful finish with this mixture.



Brush the mixture on. Wait ~30 minutes. Wipe it off with clean rag. If you are using a porous wood like oak, you should go back 1-2 hours later and wipe off any that bled out of the pores.



Repeat 2 more times, lightly sanding with 220g between coats. Allow 24 hours between coats for drying/curing.



That's it.



I have also attached a photo of my zebra wood and walnut desk I finished with the same process so you can see the finished look.



*Note* *Note* *Note* Dispose of rags safely. Boiled Linseed Oil is a "drying oil" and generates heat as it cures. If you ball up the rag and toss it in the corner, fully expect it to catch fire! I hang my rags in the backyard until they are stiff and dry, then dispose of them.


Is that high gloss after it's dried? Or was that still wet?
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post #21 of 23 Old 04-25-2018, 02:37 PM - Thread Starter
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Originally Posted by corradizo View Post
Is that high gloss after it's dried? Or was that still wet?
Speaker was wet. Finish will be low sheen, like the desk.

I will post more pics when it is done.
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Last edited by DaveFred; 04-25-2018 at 04:17 PM.
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post #22 of 23 Old 04-28-2018, 10:13 PM - Thread Starter
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I finished the sub tonight, but it is too late to play with it much. Will post more tomorrow.
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post #23 of 23 Old 12-11-2018, 03:46 PM
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Quote:
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I finished the sub tonight, but it is too late to play with it much. Will post more tomorrow.
I'm pondering building a Sub with the same driver.
So, how'd your build turn out?
How's it perform?????
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