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Dayton Ultimax 12" Build - My First DIY

post #1 of 13
Thread Starter 
I am looking for some help on my first DIY Sub build. I am going to go with the Dayton Ultimax 12" in a ported box and I was looking for some help on the design/measurement. I wanted to do a front facing dual ported box with both the sub and the ports facing forward (I like the look of these boxes). I do not have any box building software and I am having trouble finding any for a mac. Also, any recommendations on which amp I should go with would be great!!!

Thanks

Sean
post #2 of 13

Any size restrictions? 6 cu ft tuned to 20hz looks pretty good. A 500w plate amp would go perfect with that.

post #3 of 13
What size box can you live with? The UM12 is really optimized for a sealed box, and while you can stuff it into a smaller ported box, there will be a fat hump in the response. The RSS390HO would actually be a better option for ported.

If you're okay with using a pro amp, the Behringer NU3000DSP would be a good choice, and give you the option to add a second sub in the future. If you want the simplicity of a plate amp, the 500 watt Dayton or Bash plate amps will work.
post #4 of 13
Thread Starter 
I could do a sealed box - would this be a better choice for this sub? If so what size would you recommend?
post #5 of 13

With a sealed 12" sub, you're not going to get a lot of output down low. Here is a comparison of a 6cu ft ported enclosure and a 2cu ft sealed, both with 500w.

 

 

 

There's also the 4cu ft ported flat pack

http://www.diysoundgroup.com/subwoofer-flatpacks-2/4-ported-sub-flat-pack.html


Edited by Mrkazador - 7/4/13 at 9:24pm
post #6 of 13
Thread Starter 
Quote:
Originally Posted by Mrkazador View Post

With a sealed 12" sub, you're not going to get a lot of output down low. Here is a comparison of a 6cu ft ported enclosure and a 2cu ft sealed, both with 500w.





There's also the 4cu ft ported flat pack
http://www.diysoundgroup.com/subwoofer-flatpacks-2/4-ported-sub-flat-pack.html

Thanks MRK!!!

Ported it is - if I want to run 2 ports how what diameter and length should they be?
post #7 of 13
post #8 of 13
Quote:
Originally Posted by Woogier1 View Post


Thanks MRK!!!

Ported it is - if I want to run 2 ports how what diameter and length should they be?

 

For a 4cu ft enclosure tuned to 20hz, TWO 3.5" PVC x 29.75"

 

A 6cu ft enclosure tuned to 20hz would need TWO 4" PVC x 25.25"

post #9 of 13
Thread Starter 
Thanks again MRK!!
If the box is going to be 28" deep would I just put a 90 degree bend in the ports to get the 29"?

Also any recommendations on amps if I do not want to use a plate?
post #10 of 13

Yes you can use a 90 degree bend on the port. Another option is to build a slot port. The inuke 3000 with dsp is probably the best option because the dsp has an option to highpass at 20hz which is something you need.

post #11 of 13
Thread Starter 
Quote:
Originally Posted by Mrkazador View Post

Yes you can use a 90 degree bend on the port. Another option is to build a slot port. The inuke 3000 with dsp is probably the best option because the dsp has an option to highpass at 20hz which is something you need.

What is a slot port?

Also, am I better off building this box or just buying the SVS SB12 NSD? I would like to build my own but it the end result is not going be better.
post #12 of 13

This is a slot port

 

 

The SVS SB12 is a sealed 12" sub with 400w. If you go with a Sealed 12" Dayton Ultimax with 500w then I think you should get similar performance. It all depends if you want to take the time to build something or buy something premade like the SVS.

 

http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-7096

http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-752

 

That is about $434 without glue, paint, binding posts, and polyfill. In the end you're probably looking at $500-$550 depending how fancy you want to get finishing the enclosure.

 

If you want to bump it up a bit then there is this kit

http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-7097

 

and last one...

http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-7094

post #13 of 13
I used the 15 dayton ultimax in a sealed box a little under 4cu ft. I stuffed it with pillow stuffing and am very happy with it. With only 300 watts in my 3200 cu ft room, this thing rocks. I was planning on two, but one is plenty for my setup. I wanted to go ported at first as well because the response curves look so tempting, but I'm glad I was convinced otherwise. Here is the link with response graphs too.
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