Musical Subwoofer.... ported or sealed? - Page 3 - diyAudio
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Old 3rd October 2011, 08:32 PM   #21
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Quote:
Originally Posted by nonsuchpro View Post
I've built 3 boxes. 12x12x12, 16x12x18 and 18x12x24. (the 12" # on all 3 is the height due to desk limitations) I like the 12x12x12 best, it's only .6cf internally but it's giving me what I want for music.
Are these ported or sealed?
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Old 3rd October 2011, 08:32 PM   #22
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cool,

later
rev.
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Old 3rd October 2011, 08:47 PM   #23
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Originally Posted by dirkwright View Post
Are these ported or sealed?
sealed
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Old 3rd October 2011, 08:47 PM   #24
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Originally Posted by revboden View Post
all done or are you open to ideas.
I'm always up for suggestions... as long as it's a sealed design
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Old 3rd October 2011, 08:53 PM   #25
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Originally Posted by nonsuchpro View Post
I'm always up for suggestions... as long as it's a sealed design
As I showed, 1 cu ft net volume, sealed, is probably the best alignment for this driver in my opinion. I'm inspired to do something like this for another system...
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Old 3rd October 2011, 09:00 PM   #26
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Originally Posted by dirkwright View Post
As I showed, 1 cu ft net volume, sealed, is probably the best alignment for this driver in my opinion. I'm inspired to do something like this for another system...
1cu ft internal or external volume?
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Old 3rd October 2011, 09:01 PM   #27
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Originally Posted by nonsuchpro View Post
1cu ft internal or external volume?
It's always about net internal volume, which is minus the bracing, the driver and any plate amp you may have in there... You'll have to ask Dayton for the volume taken up by the size of the driver itself. I can't find it on the datasheet. I would avoid a cube also... try internal dimensions of 20" x 12.4" x 7.7". I assumed that all the internal stuff took up 0.1 cu ft, so total gross internal volume is 1.1 cu ft.

Last edited by dirkwright; 3rd October 2011 at 09:07 PM.
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Old 3rd October 2011, 09:10 PM   #28
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Originally Posted by dirkwright View Post
It's always about net internal volume, which is minus the bracing, the driver and any plate amp you may have in there... You'll have to ask Dayton for the volume taken up by the size of the driver itself. I can't find it on the datasheet.
Gotcha. Does it have to be perfect? I can use a similar drivers dimensions. I didn't do any bracing on the smaller 2 box I made. Plate amps are out of the box and in their own. O-Audio out of the box.
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Old 3rd October 2011, 09:22 PM   #29
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Originally Posted by nonsuchpro View Post
Gotcha. Does it have to be perfect? I can use a similar drivers dimensions. I didn't do any bracing on the smaller 2 box I made. Plate amps are out of the box and in their own. O-Audio out of the box.
In general, I believe the sealed box alignment is very forgiving. So, yeah, you can be off by a bit. Your 0.6 cu ft net is too small though. The datasheet has the dimensions on it. You can do a rough calculation from that. Consider the magnet a cylinder and the cone, well.. a cone, I guess I'd add a little for the basket also. Good luck and thanks for your enthusiasm!
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Old 3rd October 2011, 09:28 PM   #30
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a 10" driver displaces about .05ft^3 and yes a sealed box is forgiving and you can always add fluff and gain about 20% volume with ~2lb per ft^3

edit: when mastering for hip-hop and the like i bring a JL car-box into the studio to do sub duty as they have nuances that a "properly" designed sub does not (delayed transient response most importantly). Having a "squashed" sub will sound right for this kind of mixing.

Last edited by revboden; 3rd October 2011 at 09:35 PM.
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