duct_tape123 Posted May 9, 2007 Report Posted May 9, 2007 Alright I've decided to build a ported sub box to put in my Suburban. Its a dual 12" box. I'm using a pair of Rockford Fosgate RFZ3412. The overall dimensions are 44" wide, 14" deep, 15.75" tall. Thats a perfect 2.0 cu.ft. (using 3/4" MDF) after port and sub displacement are subtracted. I'm not sure if the port is right though. Rockford recomends a 4" dia. X 10.75" long (35 Hz)port. I have atempted to calculate the equivilant slot port and got 6.25" X 2" X 10.75" inside dimensions per sub. Is it alright if I just add the two together or should I keep them seperate. This is my first atempt at porting a box so you guys just tell me what to do. I also have plans to upgrade subs soon but don't want to build a new box. Will this box be tuned right (~35 Hz)or will I have to change the port? Also how do you tune a port to a certain frequency? Thanks, Chris
duct_tape123 Posted May 14, 2007 Author Report Posted May 14, 2007 Bump! Come on there has to be somebody that can help me!
sean 371 Posted May 14, 2007 Report Posted May 14, 2007 If you add two ports together, the length changes slightly due to less port friction. But not a super significant amount. A couple links to some box builds: Tahoe Box 1, Tahoe Box 2, Nissan Titan, VW GTI, Mini-Bump, Hummer H2, Ford F-150 My own car builds (current setup --- under construction): Overall Thread, Kickpods, Dash, Back Doors Subwoofer Wall
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