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Sealed AV12 sub questions (1 Viewer)

Troy R

Stunt Coordinator
Joined
Feb 13, 2003
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197
I am thinking of building a low Q sealed sub with down-firing Stryke AV12 driver. I have a few questions about the design, and would appreciate some help!

First I am going to try to get a Q of 0.55. Is this too low for a music only system?

In WinISD this calls for a 70 liter cabinet. So I designed the cabinet on paper with 1” MDF and with braces and got my inside volume to about 70 liters. It came out to be 27” tall, 16” square on the sides. A few questions:

Do I still need to use polyfill if my inside volume is already correct? Should I just line the walls? How much effect on the Q would lining the walls have?

What wood glue should I use?

Should I make the baffle any thicker than 1”?

How tall should the legs be for a down-firing sub?

Could someone please check my design in WinISD? I just want to make sure it is correct before I proceed in any way…

Help would be greatly appreciated! Thanks!
 

Pete Mazz

Supporting Actor
Joined
May 17, 2000
Messages
761
Should be great for music, IMO. Yes, 70 liters is a .55Q. To keep the enclosure size down a bit, you could make a 56 liter box and use stuffing to attain the .55Q.

Titebond II is my choice for wood glue.

If you surface mount the driver, 1" should be fine for a panel that size. Legs should probably be no less than 3".

Pete
 

Troy R

Stunt Coordinator
Joined
Feb 13, 2003
Messages
197
Thanks for the bump Joel!

Thanks for the info Pete! I really appreciate the help!

How would I know how much polyfill to use? I don't have any test equipment...

Thanks again!
 

Pete Mazz

Supporting Actor
Joined
May 17, 2000
Messages
761
1 to 1 1/4 lb/ft^3 polyfill to get maximum apparant Vb increase. So, if you make a 56 liter net volume enclosure, use 2 to 2 1/2 lbs. They are normally found in 20 oz packages, so buy 2 and throw it in there.

Pete
 

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