ok ive finally got the subs and amp this time. i ahve 2 12inch rockford he subs and a rockford 400s amp. im giving each sub about 2 cu ft w/ a single chamber.
i want to port it to get the most out of the subs. im having problems though coming up w/ the port size.
also is 35hz too low to tune the port for these subs??

somebody please help me out. im a bit confused as always

 

ooo im diein here... im tryin to come up w/ it on winisd. but i jus cant do it.
what im tryin to get makes the vent length wayyy to much.

 

I am too lazy to look up the t/s for your subs

I used the winisd settings for rf punch he 12. Is this the right sub? If it is 35 will be fine. You will get a 3.7 db hump at 50, and f3 of about 31. Build the box common chamber to cut down on port length. This will allow you to get much more port area also. I would shoot for 50 square inches of port, which comes out to a 22 inch port for tuning to 35.

 

I building a box by what the recommended on their website.

4.7" cf common chamber and 2 4" diameter by 10.75" long ports....

BTW it is 35hz

 

Page five on the following link... Hope that helps.
Page 9 too...
http://www.rockfordfosgate.com...N.pdf

 

ooo i finished my box finally, just needs some trimmin and some ports. but i got the box and amp rack built.

now if i have my subs facing towards the back of my rex, is it ok if i put my ports in between the subs?? so they fire back too

 

Yeah as long as the port is the right diameter and length it should be fine.

 

wow i acidentally made my box too big. its 6cu. ft. w/ 2 4x6.5 inch ports tuned at 35hz. ive only got one crappy punch z 12 hooked up now and man its loud already. cant wait till i get my new subs in and get the box all sealed up.!