Downfireing Dual Box?

CaptainPioneer · Post by **CaptainPioneer** » Thu Jul 27, 2006 8:07 am

Client wants a Downfire box for either 2 10" or 2 12" subs in a Durango...

I was thinking about doing 2 ported 12"s prolly Type R's i was thinking about 4" Aero ports what do u think about placement and length of them... I cant remember how to calculate port length at the moment (Severe Head Cold)

Also how much room should the box leave for the downfire subs... like 3 inches right?

solacedagony · Post by **solacedagony** » Thu Jul 27, 2006 8:12 am

Hmm... Box size and port length... WinISD?

hehe
I think the12volt.com has the formulas.
In the downfiring box I made, I left just enough room for the sub's movement and it seemed to work really well.

CaptainPioneer · Post by **CaptainPioneer** » Thu Jul 27, 2006 9:39 am

sounds good thanks ill check out WinISD

Ryan from Ohio · Post by **Ryan from Ohio** » Thu Jul 27, 2006 2:36 pm

I would leave about 2-3"

Fir the ports towards the front.

MobileAudio219 · Post by **MobileAudio219** » Thu Jul 27, 2006 2:43 pm

Ryan from Ohio wrote:I would leave about 2-3"
Fir the ports towards the front.

I'd fire them towards the side just to be different...

If you fire them towards the front... You'll have to leave atleast the ports diameter bewteen the seats and the box, so thats atleast 4" back from the seats, thats alot of wasted room... You could fire them towards the back and have an upside crx style box... :happy055:

CaptainPioneer · Post by **CaptainPioneer** » Thu Jul 27, 2006 3:21 pm

yea good suggestions i will definitely look into both ideas

CaptainPioneer · Post by **CaptainPioneer** » Thu Jul 27, 2006 3:22 pm

i like the firing back option the most... And i think it will be 2 12" Type Rs off of a JBL 1000.1

MobileAudio219 · Post by **MobileAudio219** » Thu Jul 27, 2006 3:48 pm

Yeah, sounds pretty good... Some subs you arent surpose to downfire (something to do with the suspension), I'm not sure if type rs are one of those, but I would check on that before I built the box...

CaptainPioneer · Post by **CaptainPioneer** » Fri Jul 28, 2006 5:24 am

ooh good call i didnt think about that ill check into that... Its really either that or one AA Arsenal

Bwcad1 · Post by **Bwcad1** » Fri Jul 28, 2006 5:28 am

CaptainPioneer wrote:i like the firing back option the most... And i think it will be 2 12" Type Rs off of a autotek mm1000.1

corrected lol