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Spud2388
05-07-2006, 10:54 PM
Could yall do me a favor and check this? It's going to be my first ported box and I just want to make sure its up to par.

Volume after sub displacement only- 4.18 cuft
4" round ports- (4) 28.72" each
desired tunung frequency- 32hz

I went off of this (http://www.psp-inc.com/psp-inc.com/cgi-bin/port_length_calculator.cgi) website.

Spud2388
05-08-2006, 04:33 PM
bump

Bolognablake
05-08-2006, 05:31 PM
How are you going to fit those ports in a box that size?

Also, pics of the Grand Cherokee install? :D

Spud2388
05-08-2006, 06:09 PM
How are you going to fit those ports in a box that size?

Also, pics of the Grand Cherokee install? :D

Ha ha ha! Yea, I'm wondering that myself. I'm pretty sure I'm going to use 4" PVC for the ports, so 90's and 45's will come into play, and it's most likely going to look like a snake inside the box with ports runing every-which-a-way.

Are those dimensions correct? Will using 4 4" ports at 28.72" in a 4.18 cuft. box give me 32 hz? I sure as hell hope so.

BTW, pics for sure!!!! I plan on doing a wrap-around type thing with the box in the middle and the amps on the sides. I'm doing all of this and still plan on keeping the ability to use the spare, which is under a cover/lid in the cargo area. Should be interesting to say the least!

Spud2388
05-08-2006, 09:31 PM
bump sry guys need the answer quick:)

Bolognablake
05-08-2006, 10:26 PM
I'll fire up BBP6. Just a sec.

Bolognablake
05-08-2006, 10:33 PM
Here's what I have:

4.18ft^3 (5.118ft^3 NET)

@32

4 - 4" PVC -> 28.58" long each.

I could play around with some box sizes (external dimensions). IIRC, in the back of the WJ, you can go 41" wide and 16.5" tall and be even with the backseat.

Spud2388
05-08-2006, 10:44 PM
Thanks! Just what I wanted to know. My box is going to be very interesting looking. Its going to be 40" wide (sit between the wheel wells) and going to extend over the wheel wells on the top half of the box. Its hard to explain, But I will be sure to post pics of the process.

Are you a member of Jeeps Unimited? I think I've seen ur pic on there once or twice.

Bolognablake
05-08-2006, 10:57 PM
Are you a member of Jeeps Unimited? I think I've seen ur pic on there once or twice.

I'm over there every once in a while. I'm a moderator on JeepForum, so that take most of my time.

JeepForum is a little more grown-up, IMO, But doesn't have as many members as JU. I think we are the 2nd largest Jeep website though.

Spud2388
05-10-2006, 08:17 PM
Ok, I was looking at a box that I have made now, which is very similar in size, and I'm not 100% sure I can fit the 4 4" ports in there. So, do yall think I could get away with 3 4" ports at 20.81" long? I know I'm getting close to the port noise territory, but would it be a toss up or would there def be port noise? What about 1 6" port 13.41" long? Not enough port area?

Spud2388
05-11-2006, 07:14 AM
btw, it will be housing 2 12" Type R's. :up2somet:

Spud2388
05-11-2006, 09:26 PM
bump for the night

Spud2388
05-12-2006, 04:01 PM
bump

Bolognablake
05-13-2006, 08:57 AM
I think you'll be fine. You don't have to worry about port noise as much with aero's.

I'll be building a box for 2 12's soon, and I'll just be using 2 4" aero's. I'm not worried about any thing.

Fast1one
05-13-2006, 12:00 PM
What if you only use two aeros and install them on both sides where the box goes over the wheel wells....that would look pimp....you could put a third i guess on top between the subs....

Spud2388
05-13-2006, 03:22 PM
Well this is where I'm at. If I use 3 4" ports made out of regualr 4" PVC, then I can fit them plus the subs on the same side. If I use aeroports, I will only be able to use 2 4" ports. The ports are goignt o have to go on the front because the sides are going to be very close to the walls of the cargo area and they cant go on top because I usually leave my cargo cover closed, so the poprts would be blocked by that.

So yall think 2 4" aeroports would work fine wine and have no port noise?

Spud2388
05-18-2006, 10:10 PM
Designing boxes ****!!!:furious: My plans have changed again!:crazy:

Ok, for two type R's, in 4.18 cuft tuned to 32 hz, what do yall recommend?

A) 2 6" PVC ports @ 31.21" long (56.52 inches of port area)
B) 3 4" PVC ports @ 20.81" long (37.68 inches of port area)

In option A, the 3 ports will start from the front of the enclosure, go in about 10", then there will be a 90 degree elbow facing up and another one after that facing the front of the enclosure, then more pipe to complete the desired length. Will look like a sideways "U".

In option B, the 2 ports will start from either bottom corner and go in about 12" to a 90 degree elbow that will turn the ports along the back of the enclosure. From there, they will go along the rear of the box toward each other. Will look like a layed down "L".

Do yall recommend the extra port area for these subs?

Spud2388
05-19-2006, 05:31 PM
bump hoping to start on the box tonight!

Spud2388
05-20-2006, 12:14 PM
bump gettin ready to go to Lowes to grab some MDF and necessary things.

Bolognablake
05-20-2006, 09:18 PM
I'd go with the 3 4" ports myself. I wouldn't want to complicate things by having mulitple bends in the port.

Spud2388
05-20-2006, 10:02 PM
The 3" ports would have 2 90 degree bends each whereas the 2 6" ports would only have 1 90 degree bend each. And the 6" ports have more surface area, but the 3 4" ports take up less volume. Its a toss up!

Does anybody know what my final tuning would be with the two?

net volume after subtracting subs and 3 4" ports 20.81" long = 3.73 cuft
net volume after subtracting subs and 2 6" ports 31.21" long = 3.16 cuft

all input is helpful!

Spud2388
05-20-2006, 10:58 PM
I thought about one slot port, but with the shape of my box, it pretty much will be impossible.