help with deciding direction to take build of dayton ultimax 15 - AVS Forum
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post #1 of 5 Old 11-07-2013, 07:23 PM - Thread Starter
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I plan to build two Dayton ultimax 15 and ran by a inuke dsp 3000.

 

This is my first post and I have read all the searches I can find about the Dayton ultimax 15 inch driver.  From what I have read it seems to fair better in a sealed enclosure,  which im totally ok with,  since this will be my first build.

 

 

Heres my room specs,  its 12 feet by 18 feet with 7.5 feet ceilings and opens into a hallway

 

 

Its use will be for HT and I want the subs to perform low 20 hz.

 

 

 

Heres where I cant find an exact answer.. 

 

do I build it in a 3 cubic ft sealed enclosure or 4 cubic ft enclosure?

will the 2 Dayton 15's reach down low enough for what im looking for?

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post #2 of 5 Old 11-07-2013, 07:31 PM
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it's funny, or maybe not, but that driver works just fine in...THE MARTY SUB!

550 watts, um15 driver. driver pretty much at xmax with that power in either cab.

marty sub (11 cubic feet, ported, tuned 17hz) vs. 4 cubic feet sealed.

2 pi space. no room gain.

green is marty sub.
red is 4 cubic feet sealed.
blue is 3 cubic feet sealed.


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post #3 of 5 Old 11-07-2013, 07:35 PM
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here is the marty sub post: http://www.avsforum.com/t/1489541/large-ported-dayton-ho18s#post_23711347

it is just a generic concept for inspiration.

btw, welcome aboard!

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post #4 of 5 Old 11-07-2013, 07:51 PM - Thread Starter
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ya I looked at that build the other day was interesting and confusing at the same time.  I really like how the one guy turned it into an end table.

 

I don't see a sono tube or port anywhere so my understanding is the length of the slot brace over top of those slots is what determines the subs tune?  am I correct in this?

Since im using a different driver am I going to have to change the length of that brace?

 

Looks simple enough to build,  the question is can I find a spot in the room for 2 of them.

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post #5 of 5 Old 11-07-2013, 08:41 PM
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"I don't see a sono tube or port anywhere so my understanding is the length of the slot brace over top of those slots is what determines the subs tune? am I correct in this?"

correct.

"Since im using a different driver am I going to have to change the length of that brace?"

nope. an enclosure is tuned based on the volume of the cab and the size/length of the port. the performance of the sub will change based on the driver that it is loaded with, but in this case, the driver that you have selected has an almost identical frequency response to the 18" driver that the cab was designed for (of course, the 18" will have slightly more max spl because the driver is a little larger).

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