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View Full Version : Rockford P2 12 box in 99 jimmy



99jimmy
11-27-2012, 10:27 PM
Hey guys first post hopefully more to come. I am looking to build a box for 2 2005 Rockford p2 12s. They are in a prefab bassworx box running off a new Kicker ex1000.1 wired at 2ohms pushing 400rms; This is in my 99 GMC Jimmy. I am hoping someone can just double check my calculations as this is my first time building a box. First I followed the video in the sticky for the calculations. I am looking for the box to have a net volume of 3.6 tuned at 34hz.

I came up with inside dimensions of 13.5 deep x 34.5 wide x 16.5 high and the port 16.5 high x 3 wide x 28.32 long. Both subs displacement is .144 and I was thinking single baffle with a couple small braces on the front wall. I will be building it out of 3/4 inch mdf.

If I missed anything sorry and just let me know. Thanks for your time.

mklett33
11-29-2012, 02:33 PM
Hey guys first post hopefully more to come. I am looking to build a box for 2 2005 Rockford p2 12s. They are in a prefab bassworx box running off a new Kicker ex1000.1 wired at 2ohms pushing 400rms; This is in my 99 GMC Jimmy. I am hoping someone can just double check my calculations as this is my first time building a box. First I followed the video in the sticky for the calculations. I am looking for the box to have a net volume of 3.6 tuned at 34hz.

I came up with inside dimensions of 13.5 deep x 34.5 wide x 16.5 high and the port 16.5 high x 3 wide x 28.32 long. Both subs displacement is .144 and I was thinking single baffle with a couple small braces on the front wall. I will be building it out of 3/4 inch mdf.

If I missed anything sorry and just let me know. Thanks for your time.

Thanks for following the video, hope it helped. Everything looks ok, but you would be running at about 1.81 cubic ft per subwoofer. I would say you could probably go a little larger, more like 2 cubic ft per sub. So use 4 cubic ft total as your box size, the program will take into account sub displacement and port volume. I ran 2 mtx 4500 12's in a jimmy before (ex gf's vehicle) with around the same specs off 500 wrms and it was honestly pretty nice. Did around 145-146 iirc.

---------- Post added at 02:33 PM ---------- Previous post was at 02:33 PM ----------

Oh and I did subs back port back if that helps.

99jimmy
11-29-2012, 11:10 PM
Thanks for answering my question. The video helped a ton as I was honestly kinda lost as to how to design a box being the right size. I designed the box just like you explained in the videos and designed it in sketch-up. The box is now redesigned to 4 cubic ft. I will be making the box this weekend some time and I will make sure to post pics as I go. I will be running the subs and port towards the back so that does help. Thanks again for the help and keep the videos coming.

99jimmy
12-05-2012, 09:02 PM
Got the box done it sounds amazing compared to the prefab. Hits way more frequencies and sounds cleaner. Here are some pics of the prefab and the new one.

http://i590.photobucket.com/albums/ss344/matty21_69/IMG_0454.jpg
http://i590.photobucket.com/albums/ss344/matty21_69/IMG_0452.jpg
http://i590.photobucket.com/albums/ss344/matty21_69/IMG_0446.jpg
http://i590.photobucket.com/albums/ss344/matty21_69/IMG_0444.jpg

mklett33
12-06-2012, 02:43 PM
Got the box done it sounds amazing compared to the prefab. Hits way more frequencies and sounds cleaner. Here are some pics of the prefab and the new one.



You know what man, I seriously just shed a **** tear. So AWESOME to see someone put those vids to good use and create a legit box! Please do me a favor and check your pm's.

bertsq
12-07-2012, 07:50 PM
Should face the subs upwards so it doesn't rattle the back door as much.

Loudmp5
12-07-2012, 08:22 PM
This your 1st box? Looks 10x better than my 1st lol