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-   -   Music Anyone local ever build any sub boxes? (http://www.chiefsplanet.com/BB/showthread.php?t=275450)

Silock 08-20-2013 02:47 AM

Anyone local ever build any sub boxes?
 
I need some help :(

Baby Lee 08-20-2013 03:06 AM

Home or auto

Rausch 08-20-2013 03:21 AM

Free air or enclosed?...

Silock 08-20-2013 03:24 AM

Home.

I need to build a 9.3 cu. ft. ported box (or two, ideally), with 3 4" ports, 25" long (which basically means they'll have to be curved). I think I can figure out how to do all that, but that makes the bracing WAY more complicated. That's where I'm in over my head, I think.

Rausch 08-20-2013 03:28 AM

Quote:

Originally Posted by Silock (Post 9900979)
Home.

I need to build a 9.3 cu. ft. ported box (or two, ideally), with 3 4" ports, 25" long (which basically means they'll have to be curved).

Are you worried about figuring the footage for airspace or just the pain in the ass of angling the requirements for the shape you'll need?...

Silock 08-20-2013 03:31 AM

Quote:

Originally Posted by Rausch (Post 9900981)
Are you worried about figuring the footage for airspace or just the pain in the ass of angling the requirements for the shape you'll need?...

The pain in the ass of doing the internal bracing. I'm just not very good at building stuff; even with instructions, it always comes out wrong. I am going to build the box slightly bigger than I need, and then I can use acousta-fill or pillow stuffing to bring the volume down as needed.

What I need as finished product, though, is 9.3 cu. ft. of air, and 3 four inch ports 25.59" long, so that the box is tuned to 19.8 Hz. This is for an 18" home theater sub.

Baby Lee 08-20-2013 03:34 AM

Quote:

Originally Posted by Silock (Post 9900979)
Home.

I need to build a 9.3 cu. ft. ported box (or two, ideally), with 3 4" ports, 25" long (which basically means they'll have to be curved). I think I can figure out how to do all that, but that makes the bracing WAY more complicated. That's where I'm in over my head, I think.

Have you researched Sonosub?

They make them professionally manufacture them now, but the starters of the company made Subs with Sonotube [the form for concrete footings] and wood endcaps, sub on one end and port at the other, then feet facing down one the sub endcap.

Can be sized however you want, gussied up howe3ver you want, and tube design ameliorates need for bracing.

http://t3.gstatic.com/images?q=tbn:A...4f-_W8vzNHvAVo

http://www.hometheaterhifi.com/volum...ptember-99.jpg

http://i870.photobucket.com/albums/a...s/SDC11815.jpg

Silock 08-20-2013 04:15 AM

Thought about it, but I can't do a vertical enclosure (the driver would eventually sag), and a horizontal enclosure would stick pretty far out into the room.

Silock 08-20-2013 04:24 AM

Well, hmm . . . downloaded the Sonotune software for shits and giggles, and this one is telling me the sag is acceptable. WTF.

Silock 08-20-2013 04:30 AM

I guess the real question is where I can get a ****ing 22" Sonotube around here.

Rausch 08-20-2013 05:18 AM

Quote:

Originally Posted by Baby Lee (Post 9900987)
Have you researched Sonosub?

They make them professionally manufacture them now, but the starters of the company made Subs with Sonotube [the form for concrete footings] and wood endcaps, sub on one end and port at the other, then feet facing down one the sub endcap.

Can be sized however you want, gussied up howe3ver you want, and tube design ameliorates need for bracing.

http://t3.gstatic.com/images?q=tbn:A...4f-_W8vzNHvAVo

Is that a sub bigger than a water heater or just perspective?...

Rausch 08-20-2013 05:22 AM

Quote:

Originally Posted by Baby Lee (Post 9900987)

That looks like an old M&K box that was TOTL in the mid 90's...

Baby Lee 08-20-2013 05:58 AM

Quote:

Originally Posted by Rausch (Post 9901008)
Is that a sub bigger than a water heater or just perspective?...

I'd estimate 7 footer.

Rain Man 08-20-2013 12:52 PM

Quote:

Originally Posted by Baby Lee (Post 9900975)
Home or auto

Based on his original post, submarine.

Baby Lee 08-20-2013 01:20 PM

Quote:

Originally Posted by Rain Man (Post 9901760)
Based on his original post, submarine.

Oh, in that case.

http://t3.gstatic.com/images?q=tbn:A...dG76UZUWnkG3Tg


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