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thebread
07-09-2009, 07:45 PM
I'm relatively new to car audio. I have a 4ch amp and some aftermarket speakers. However I don't have a sub stage yet and I'm looking into it right now. I plan on getting an IDQv2 12". I want a SQ sub and that seems to fit the bill. I've been looking around for specs on the box best suited for it. I also plan on making the box(sealed). The dimensions I plan on using are 20" wide, 16" tall, a top depth of 7.125" and a bottom depth of 8.125". I'm looking for an end result of about .88ft^3. The speaker displacement is .07 ft^3. With those dimensions I end up with around .88ft^3 net. But I don't think I'm accounting for the 3/4" MDF. Can someone tell me what exactly I need to do before designing my box.
Thanks.
Sorry for wall of text...

JimJ
07-09-2009, 07:46 PM
http://www.the12volt.com has a calculator.

91Chevy
07-09-2009, 08:26 PM
Those dimensions give 0.873ft³ before displacement, 0.803³ after displacement.

thebread
07-09-2009, 10:10 PM
How do you figure?

cx-7heaven
07-09-2009, 10:14 PM
Very good, easy sealed box calc:

http://www.rockfordfosgate.com/rftech/box_wizard.asp

thebread
07-09-2009, 10:26 PM
Thanks for those links, appears as though I was doing it correct, just needed to be sure.

91Chevy
07-09-2009, 10:28 PM
How do you figure?

I did me some Maths :)

(Length - 1.5) * (Width - 1.5) * (Height - 1.5) = Volume / 1728 = Cubic Feet

thebread
07-09-2009, 10:37 PM
Yeah I did that, you must have used a dimension that I didn't accidentally.

nineball
07-09-2009, 10:44 PM
it would be a lot easier to build if you made it a straight rectangle. no angle cuts to worry about making and sealing it up good would be a snap.

91Chevy
07-09-2009, 10:47 PM
it would be a lot easier to build if you made it a straight rectangle. no angle cuts to worry about making and sealing it up good would be a snap.

Oops... reading > me. I didn't notice the 4th measurement :(

thebread
07-09-2009, 11:07 PM
it would be a lot easier to build if you made it a straight rectangle. no angle cuts to worry about making and sealing it up good would be a snap.

Yeah, I was thinking that myself, and was just going to make 1 depth of 7.625 as opposed to the wedge design.