Kris209

A friend of mine at work said I should ask for some peoples opinions on here before I build the box to get some feedback from people who have been doing this for quite sometime. So first here is the woofer specs

(2) Concept PT-12
12" 700RMS Dual 2ohm (Each wired in series for 4ohms)
FS: 41.99
Qts: .470
Qes: .513
Qms: 5.677
Vax (liter) 19.93
Xmax (mm) 10.5
Efficiency: 86.46
Re: 0.8ohm


And using BassBox Pro 6 this is what I came up with for a box. It will be seperated into 2 chambers since each sub has it's own amp

External Box Dimentions:
14" high x 34" wide x 22" deep

The middle divider of the box will have (2) 3/4" MDF glued/screwed together to add support and stregth. Then beside the middle divider is the ports tuned for 34hz, each being 12.5" tall x 2" wide x 28" deep. The subs also face the rear and will be going beside each port.


But, before I build anything I like peoples oppinions. I did a search on here for info on ports and I'm worried about 2 things, the 2" opening being to small (even though it's 12.5" tall) and also the fact the port is 28" long. Seems like that might cause to much port noise which I would like to avoid as best as possible.

Anyways, just looking for peoples oppinions on how they figure this box will preform. I like my bass deep and loud, so I think it should do alright.

Kris209

Forgot to mention that it's going to be a trunk installation.

Thanks for the input Dukk, judging by my search you seem to be the guru of ports so your oppinion is appriciated

zarx

if your worried about port noise, you can always router the edges to get rid of and sharp corners. That will definitely help.

Kris209

Already plan to. Also might be cutting some small 45 degree pieces to lay on every edge so there are no 90 degree bends... if that makes any sense. I'm also going to think about making the ports curve instead of being at a right angle, but for the extra work I'm not sure if it's worth it.

Starterwiz

I'd probably shorten that port up a couple or three inches. If the wall of the box is a wall of the port you need to subtract half the port width, and a long thin port will add a bit of friction and tune lower.