need help with two DD 9515 enclosure design - FloridaSPL
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Old 01-06-2009, 09:37 AM   #1
audiowaves1
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Default need help with two DD 9515 enclosure design

i have 2 dd 9515 subs and wanna get the optimal air space and performance out of these, i have an 03 expedition and want to Build an enclosure this weekend so if anyone can help please let me know i want to only use the back 3rd seat is not going to be used so i have the whole back area... let me know if you have any ideas or if you have built one for these and let me know how they perform and the best enviroment, thanks in advance...
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Old 01-06-2009, 10:46 AM   #2
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That are the dimensions, son?
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Old 01-06-2009, 01:48 PM   #3
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demensions of rear....

length= 48
width= 48
height is 32


if anyone can work with that... those are the max external dimensions i can fit.
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Old 01-06-2009, 02:27 PM   #4
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You've got plenty of space. You said 9cuft with 144+ sqin of port area, so I'll get on that with google sketch if I get a chance.

BTW, any luck on selling that bike?
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Old 01-06-2009, 03:59 PM   #5
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Bike Is Sold... Now Putting The Money Into This.. Haha
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Old 01-06-2009, 05:43 PM   #6
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Call brad furgard at DD he is the tech guy for them. He had a crx in Street A a few years back at world finals and it was louder than any other street Car in A B or C using DD 9510s I believe.
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Old 01-07-2009, 10:04 AM   #7
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I'm about halfway done. The specs DD gave you is for like a 40Hz tune, so that is what I did...only with a little more space and even more port area.

With those subs, and the box specs DD reccomended, and a decent amount of power, you'll rip in bass boxing with a song in the mid 40's.

It wont drop low low, like below 30Hz, but most songs dont go that low.
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Old 01-07-2009, 12:28 PM   #8
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thats good. they also recomended somewhere in the upper 30s like 35-38 but 40 sounds good.. firing back and ported back?
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Old 01-07-2009, 12:37 PM   #9
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~9cuft with room to spare after sub displacement.
~Tuned to 40Hz
203sqin of port area
Port is 23.5" long
Double 0.75" MDF all sides
Port cut is 45" long by 22" wide
Bottom is the same as the baffle, which is the top

Brace front to back, side to side, and top to port with allthread and resin the inside. May even want to round the back bottom corner with 4" PVC and fiberglass for optimal air flow.

If anyone sees and issues with the box (I know the port is rather wide for how tall it is) please feel free to critique.

You're looking at like 3 sheets of MDF for this one. I'll make a cut sheet if I can.

Last edited by CBFryman; 01-07-2009 at 12:43 PM..
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Old 01-07-2009, 02:43 PM   #10
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so subs on top and open inside? how deep is the port?
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