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This sub definitely deserves more attention, performance is amazing, its a fun build and can be had at a fairly low cost. I suspect its size is a deal breaker for most.


Want to send Mark a big thank you for this design and give an example of how to 'hide' a sub this big in plain sight.


 

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Discussion Starter #62
Nice work!

I have done this type of design in the past. It really looks like a credenza.

Even makes an old cabinetmaker proud!

As for performance.

It is a fun ride.

And it never stops. The performance level is truly unobtainable with just about anything else.

So you get a trade. You do have a big box.

With seriously big sound.

And you can drive it with amazingly little power.

You make me very happy.

A few guys have done this , and created a very professional looking cabinet.

What did you use to construct it?
 

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Awesome build! How can you keep anything on the walls? I built a few subs, and as you say, size and where to put them can be an issue. My (2) are the Decware "House-Wrecker", and Bill Fitzmaurice Tuba HT Horn Sub. They both will split atoms if you push them. I use the House-Wrecker in my HT set up, and the wife insisted that the BF Horn get regulated to the Garage (its Big @ 30x36x36). Hard to beat a horn loaded sub, as they are efficient and pound out the bass.
 

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Nice build ChoEnd!

I got the plan myself and I can't wait to build mine. I want to turn mine in a sort of cabinet too so it look nice. Doing this will allow me to be within the WAF while using a crazy large subwoofer. I'm not sure what I will build but I plan to use Red Oak. Since I don't have the best wood worker skill in the world I will not all out like you but I wan't to make something nice!

I just finished to built a Tuba HT for my brother in law and even the Tuba with 25 watt can pound quite hard. I can't imagine this subwoofer!
 

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Mark,
The speaker was built using OSB, it just seemed wrong using OSB for a speaker but for the $ I figured if was unhappy I'd redo it..no regrets.
The top is cherry and front cherry frames w/veneered curly maple panels. Each attached with a few blobs of silicone. This came in handy when I burnt up the original driver. I used a forstner bit to cut reliefs for all the driver cover screw heads.

hesster,
An oddity is nothing on top of the speaker seems to be impacted but the rest of the house is in full motion, pictures, mirrors kick knacks all rattle and complain.

steeve-0,
Its a really fun build just keep critical horn path dimensions to plan and square, PL adhesive will forgive the rest. If you don't have much wood working equipment a track saw or hardboard jig circular saw will break down 4'x8' sheets cut laying on pink board insulation(google) will get you through. Use screws instead of expensive clamps. As for WAF, who know what your missus will accept but old shutters/cabinet doors or even windows are possibilities to skin cabinet.
 

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Discussion Starter #66
OSB rules man!

When you actually work wit it a lot, (as I do in making prototypes) you find that it is really a great almost ideal material.

You made a beautiful cabinet.

And you have the same experience that I do. Very little shake rattle and roll on the box.

Not so for the rest of the place!

I have one TRIO12 kicking around if anyone wants one.
 

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Mark, could I please get the information on this.
I was fascinated by this a few years ago and actually contacted Creative about shipping, but delayed and it taken off their list.
I discovered this thread and figure if I'm going to build a front loaded horn it might as well be a whopper.
thanks
Paul
 

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Discussion Starter #68
No problem.

You can get a hold of me here:

mark at kravchenko dash audio dot com

Loose the spaces, and change the at (@),dash(-) and dot(.) to the appropriate punctuation and you have my email address.I have all of this set up in a nice format.
 

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Yeah... is this a finished product that is sold or can you buy the plans?
It's a set of plans, very detailed with plenty of photos. My set is a couple years old. I'm sure there have been improvements to them since then.

PM Mark directly for more information. He's usually pretty quick getting back to people and, for me at least, dealing with him was a pleasure.
 

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I wanted to build mine this summer but with the moving in the new house I've got no time for that (got to clean my grand parent mess, they left half of their stuff here). Next summer I've a lot of renovation to do. In these renovation I will build my futur HT room which will have a 2nd purpose living room.

The Ultimate Subwoofer is planned as a subwoofer for at least the beginning and if I find myself wanting more bass I might go for more of these or something else depending on how I'm pleased by the build. One thing is sure is that I can't wait to build it.

I also want to build some SEOS speaker, possibly the Tempest or Sentinel with Volt-10.

The best part is that my girlfriend gave me the go ahead on anything. She don't ming a big subwoofer of speaker. All she asked is some nice wood veneer finish on most of the stuff. I clearly told her how big this thing will be and how I plan to sort of hide it. I also told her how big sentinel are. She doesn't mine, she actually start to love more and more the good sound we already have with the current setup and she wan't to see what can sound better. Maybe I should marry her?
 

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Discussion Starter #73
There are a couple of things necessary for wife.

Strong like horse.

Pretty like tractor.

Love good sound!

After that, it's all good.
 

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Plans for this bad boy are available? My latest build sounds good, but this one seems like it would be the ultimate setup!
 

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Discussion Starter #75
Yep.

Contact me at:

mark at kravchenko dash audio dot com
 

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Haven't been on the forum in a while and just stumbled across this thread. Had to post as I built one of these:
MY BUILD
It's still going strong 5 years later and is used DAILY for TV, movies, music, etc. This includes a LOT of abuse when the kids play dubstep and trap music!

Just this weekend the wife had some friends over drinking a little wine and she turned up some music. Eyes got big and mouths literally dropped open. One person didn't say anything or close her mouth for about 30 seconds. I've never had anyone hear it that wasn't amazed. (Once a year I circle the house and pound the siding nails back in.)

It was so fun to build, I'm almost disappointed that it has performed so well for so many years. (Although it's nice to know there's a replacement driver.)

Mark, please dream up something that trivializes this horn. If a 12" driver and 300W can do this, what can an 18" driver and 2000W do? If you can design a 'Transcendent Subwoofer', I will build it.

...mose
 

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Discussion Starter #77
Oh do you make me smile.

Like a proud Pappa!

Nice!

I have in fact done a design that betters your existing sub. And it uses 4pcs of 8 inch drivers.

Here is a teaser.
Ultimate sub with four KA8NEO's.png



There will be some news fairly soon.

I have done boat loads of design work on different sized enclosures and driver combinations over the years. It turns out that this already large size produces the biggest bang for the buck. A larger driver will require a much larger enclosure to maximize on the greater volume of air you can shift.



That is until I release the newer version.

Ultimate sub with four KA8NEO's 140 watts input.png

This is a simulation using 140 watts of power.

Yes it is indeed time to think this over! That is also pushing these drivers close to their 14mm Xmax. They are that efficient.


I'll see what I can do with it over the next few months.

And I'll keep you guys posted.
 

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I've not been much active on the forum lately but I still read a lot of thread here.

I got my trio 12, I got your plan Mark and I've not forgotten you! I will make a build thread when I'm ready and I will give you your due credit when the time come if this Ultimate sub is any good. I heard it has the side effect of giving perma grind ? :)

Anyway I've been really busy since a years. I bought my house and I need to work on it a little. Then I got a nice garage that I will slowly but surely convert into a wood working shop.

I also might get some Fusion Tempest or Sentinel build going on to replace my SVS speaker.

Really love your plan Mark keep up the work and I hope to say soon enough that I also like your creation!
 

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Discussion Starter #79
The next plan will include a build video. A little easier than all the work that three of us put into producing the last one.

Plus you guys will get to see me put one together. It'll be a hoot.

Might even be able to teach a few people a few tricks. Been a cabinet Maker for quite a long time. And showing a little bit of what I have learned can be rewarding to.
 

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Hi Mark, waiting with baited breath for your new design, count me in for a build. In the meantime I am looking to upgrade from the trio 12 to the faital pro. I see in these threads mentions of the 12FH520 and the 12FH510. Which one? I am assuming its the 520 having seen your graphs on page 2. I have lived with the Ultimate SW now for just over 2 years and still can't wipe the smile from my face. Movies and music, fantastic. As you know I was contemplating a bigger build, but I need more practice with horn resp so that was shelved and a second USW was planned. However I will hold off until you have finished this new design. I for one would be more than happy to pay in advance while waiting for the final plans and also for the drivers to get in early. Wow SPL of 120db @ 16hz.

All the best, Rob.
 
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