RL-i 8s box help

[MikeJ 0]

Ok I now have 2 SS 8s and i need to build a nice box for them. I know how big I want to build it 41 x 10 x 12. This will give me 2cu ft of air before port. i would like to port it to around 29-31hz with 2 3" ports. Here is what I need help with how long do they need to be? I dont know how to figure out how much air the ports will take up in the box. Not sure if it matters.

Thanks for any help with this.

Mike J

[ANeonRider 3]

Port volume = pi*r^2*h

Figure out the length by using any port calculator out there.

www.the12volt.com has one

I would aim for 0.5-0.65 of volume each after displacements.

[MikeJ 0]

Thanks I will go check it out.

[MikeJ 0]

So when I tell it 1.5cu ft and it gives me a size port to use do I have to build the box bigger to make up for the port or not? I just want to make sure.

Thanks again for the help.

MJ

[ANeonRider 3]

That calculator assumes that volume you entered is the box volume after displacements.

So in other words, that volume you entered + the port displacement + bracing displacement + driver displacement = total volume.

[joebangaa 0]

you like it front firing?

[MikeJ 0]

you like it front firing?

<{POST_SNAPBACK}>

I was thinking about facing the subs up and the ports to the back. I want to port it low, I want the best sq I can get out of them. Right now I have my RL-p 12 pointing to the back with the port. That 12 sounds real good just want to take up less room.

It is going in a Scion tC.

[CBFryman 2]

Pics when its installed

[Aaron Clinton 2,372]

Pics when its installed