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View Full Version : new box for DD 9512d



bluieorbluee
03-28-2009, 03:11 AM
hey guys i need some advice on boxes.
i found some designs and wanted to know if it would be ok for the DD.

here is one from ROE:
Net volume: 2.5cuft
Tuning: 35Hz
Port Area: 37.5sq in(15"Hx2.5"W)
Dimensions:16.5H"X18D"x24W"
http://i71.photobucket.com/albums/i137/judtoff/2_5cuft35Hz.png

Here is another from ROE:
Net volume: 3cuft
Tuning: 35Hz
Port Area: 45(15"Hx3"W)
Dimensions:16.5H"X20D"x26W"
http://i71.photobucket.com/albums/i137/judtoff/3cuft35Hz.png

From here:
2.95 @ 34
http://img23.imageshack.us/img23/3493/295cubes34hz3625sqin2dd.png

Are these designs any good for my sub?

Thanks in advance guys.

cj407
03-28-2009, 03:15 AM
tuning to 40 is what DD recommends and usually is better.

cj407
03-28-2009, 03:16 AM
2.75 net volume would be best....net meaning after port displacement and sub displacement

Mattd0344
03-28-2009, 03:17 AM
I think you may need some more port area. On DD's website, the 9512G calls for 2.6 cubic feet with 52 square inches of port. I know you have the d series, but that's what I would compare to.

http://www.ddaudio.com/dd/caraudio/DD_woofers.asp?series=9500g

Korn4Life
03-28-2009, 03:18 AM
I would also try to make the port right around 50sq in

bluieorbluee
03-28-2009, 03:30 AM
Hey guys, thanks for the fast replys and all. im not really good with doing these box calculations that why im searching for pre made designs. lol
here is the closest thing i found so far from ROE:
Net volume: 2.5cuft
Tuning: 40Hz
Port Area: 45sq in(15"Hx3"W)
Dimensions:16.5H"X18D"x24W"
http://i71.photobucket.com/albums/i137/judtoff/2_5cuft40Hz.png

FASTIMES
03-28-2009, 04:22 AM
Pmed...

bluieorbluee
03-28-2009, 03:00 PM
hey guys, how would i determine the port length?
ive been going nuts trying to figure how how to do this.
ive been using this:
http://www.the12volt.com/caraudio/boxcalcs.asp
and entered the info from the boxes above and nothing matches up.
any ideas?

FASTIMES
03-28-2009, 03:29 PM
replied...