Aero port help

[StatingROBIN]

The box is 35" wide, 14" tall, 24" deep at the top and 30" deep at the bottom. The sub is a Sundown Z v3 18. I have calculated that 2 4" aeros that are 9.5 inches long will give me 30 hz but my question is about the port area.

[Tarball]

Need more port. Aim for at LEAST 12sq in per cubic foot of box space.

[Joe X]

4.74 square inches per cube is too low, if you can port to the side a single 8" 26" long could do the job.

[Joe X]

Need more port. Aim for at LEAST 12sq in per cubic foot of box space.

9-13 for aero ports

[StatingROBIN]

4.74 square inches per cube is too low, if you can port to the side a single 8" 26" long could do the job.

Wouldnt that tune it really low?

[Joe X]

Ok I factored in the slant and it needs to be only 23", but my point is port area 1 8" will be enough.

[StatingROBIN]

Ok I factored in the slant and it needs to be only 23", but my point is port area 1 8" will be enough.

Thanks. I really appreciate it a lot. Now i just gotta find an 8" port.

[fecupe2001]

Something you have to take into account, is that the port area depends mostly on the sub and how flat you want the respond of the box, 2 4" aeros is WAY too small for that badass sub, i don´t know if you want a nice bandwith, having a LOW peak, etc etc, you said you want to tune it @ 30 hz, why that low? you would end up with long aeros that would shrink the box even more, that sub can definitely play below tuning frequency very strong, maybe 33-35 hz tuning is more than enough.

Said all that, joe X is right, a single 8" port could do the job, would play very nice on every frequency you play, i would try to use 2 6" aeros, you can use PVC pipes and make some nice flares with a heat gun, or spend extra 70$ and buy a pair of aeros @ partsexpress wich i honestly think it´s your best option, they are 17" long and would get you around 36 hz tuning and 5.4 cubic feet after displacement, that box should play VERY nice in my opinion...

[StatingROBIN]

Something you have to take into account, is that the port area depends mostly on the sub and how flat you want the respond of the box, 2 4" aeros is WAY too small for that badass sub, i don´t know if you want a nice bandwith, having a LOW peak, etc etc, you said you want to tune it @ 30 hz, why that low? you would end up with long aeros that would shrink the box even more, that sub can definitely play below tuning frequency very strong, maybe 33-35 hz tuning is more than enough.

Said all that, joe X is right, a single 8" port could do the job, would play very nice on every frequency you play, i would try to use 2 6" aeros, you can use PVC pipes and make some nice flares with a heat gun, or spend extra 70$ and buy a pair of aeros @ partsexpress wich i honestly think it´s your best option, they are 17" long and would get you around 36 hz tuning and 5.4 cubic feet after displacement, that box should play VERY nice in my opinion...

So if i do sub up and the two 6" aero ports back at the 17" length it comes with then that should give me a tuning around 36 hz and will be able to play low notes well? The reason im asking is so i know exactly what to do once i start building the box soon.

[fecupe2001]

Yes, you should get a nice F3, you could definitely play from about 28 hz without any problems, like i said, that´s a badass sub for sure, you could get away with 3 4" aeros but i honestly recommend you a bigger port area since you could get a way stronger output