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View Full Version : Need Box Help (Dual 15" Hifonics Brutus walled in C pillar of Blazer)



bigeffinghammer
12-25-2011, 03:53 AM
Hey guys, I am working on designing a new box for my Blazer.
This time I want to wall in two 15's at the C pillar of my 2002 Blazer LS.

Anyway, did some figuring.....

Came up with this design and these specs and such:

Port:

Slot port tuned to 32Hz with 8 ft. ^ 3 volume showed:
103.25 in. ^ 2 port area (current area: 213 in. ^ 2)
Port width of 35.5 inches and height of 6 inches showed:
40.27 inch port length (current length: 43.75 inches)

Volume:

Inside height: 21.75 inches
Inside depth: 19 inches
Inside width: 17 inches (per chamber)
1.5" spacer/support between each chamber
Yields 4.0655 ft. ^ 3 per chamber
Total for both chambers: 8.131 ft. ^ 3

Design: (Yes, there are no sides on it. That is so you can see the insides. Also, I wanted the back of the port (just what you can see from the front) to be plexiglass so I can still see out my review mirror.)
26529469

kushy_dreams
12-25-2011, 04:50 AM
Assuming airspace works with those woofers, add some 45s in the corners and you should be good.

bigeffinghammer
12-25-2011, 04:54 AM
Assuming airspace works with those woofers, add some 45s in the corners and you should be good.

Hey, thanks for the reply.
According to the manual for the BRZ15D4, the optimal airspace for a ported design is 4 ft^3.
http://www.maxxsonics.net/manuals/hifonics/pdfs/HifonicsBrutusBRZ09subwoofermanual.pdf

Also, 45's just for support?

Edit:

Also, I've always wondered...
If you calculate stuff and figure out a port size, is that for single chamber or multiple chamber?