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RuinedAng3l
05-23-2009, 03:20 AM
Sup.
So i have a question about the length of my aero ports for a box im building....
This is my box:

http://i132.photobucket.com/albums/q2/RuinedAng3l/JeffsBlazerBox.jpg

I get 7.03ft^3 for the net volume, without speaker and port displacement.
6.43ft^3 with speaker displacement.
I am running 4 RE SE 12's Dual 2ohm Subs
Subs will be powered by a RF T20001BD rated at 2880 watts @ 14v @ 1 ohm.
Subs will be wired at 1 ohm and i have the electrical backing to keep it at 14v.
I am using 3 4" Aero Ports. The top flare is 3.5" long, and goes from 4" to 6" wide. The bottom flare is 3" long, and goes from 4" to 6" wide. How long would the section of tubing be that goes in between each of the 3 flares to give me 30hz? This is my first time running RE subs. Any advice for the tuning would be greatly appreciated.

Heres the specs on the subs:
1200 watts peak output
12" competition grade subwoofer
600 watts pure RMS
Qes: .49
Qms: 4.5
Qts: .44
Free Air Resonance -Fs: 25.1 Hz
Vas: 72.9 liters
Overall Diameter - 12.5"
Bolt Hole Circle - 11.75"
Motor Width - 6.25"
Motor Depth - 3.25"
Basket Depth - 3.25"
Displacement - .15 cu. ft.
Weight - 22 lbs.
One-Way, Linear Excursion -Xmax: 18 mm
Efficiency - 86.1 dB SPL @ 1w/m
DC Resistance -Re: 2.8 ohm
Mounting Depth - 6.5"
Mounting Hole Diameter - 11"
Dual Composite 2-piece Cone
Rubatek Foam Surround
Cast Aluminum Basket
Tork-Tite Terminal
3" 4-layer Aluminum Voice Coil
FEA Optimized Motor Structure
Triple Stack Maganets
Progressive Spiders
Wrap around Rubber Gasket


Any help would be awesome.
Im pretty stumped....

RuinedAng3l
05-23-2009, 11:13 AM
Anyone?

GearGuy2001
05-23-2009, 11:16 AM
http://www.psp-inc.com/

Go there then Port Length Calculator and type in your specs

I came up with 14.13" for each 4" pipe when your using a flared port.

RuinedAng3l
05-24-2009, 03:31 AM
Cool. Thanks GearGuy2001! Anyone else have input?