port area per foot help

[Ricky A.]

make it wider and not as long

[toadking90]

make it wider and not as long

then the tuning is way off

[MrSkippyJ]

the box i am designing is going to be 6 cub's. so to make a port big enough for that with 12 per foot at 18.5 inches tall for port which is the max i can go upwards and 4 wide it has to be 20 inches long to make it to the 37 hertz tuning freq. i am trying to get it down to 35. my box can be no bigger than 20 total outer dem. so my port is not possible at 12 per foot. what do i do about that? just not go for 12 ? do maybe 8 or somthing?

you are talking about tuning and port area as being related, they aren't.

THe lower you want your tuning, the longer you have to make the port. The MORE port area you have, the more port length you need for lower tuning.

The box size isn't important, what subs are your running?

[MrSkippyJ]

make it wider and not as long

that would raise his tuning.

[toadking90]

the box i am designing is going to be 6 cub's. so to make a port big enough for that with 12 per foot at 18.5 inches tall for port which is the max i can go upwards and 4 wide it has to be 20 inches long to make it to the 37 hertz tuning freq. i am trying to get it down to 35. my box can be no bigger than 20 total outer dem. so my port is not possible at 12 per foot. what do i do about that? just not go for 12 ? do maybe 8 or somthing?

you are talking about tuning and port area as being related, they aren't.

THe lower you want your tuning, the longer you have to make the port. The MORE port area you have, the more port length you need for lower tuning.

The box size isn't important, what subs are your running?

two t3 600's 15s. and if i am coming off to be a jerk i am not trying to. just trying to understand. thank you for you input

i guess i could instead of putting the port in the middle like i would like i could put it on the front on the side so i have room to wrap it around.

[MrSkippyJ]

two t3 600's 15s. and if i am coming off to be a jerk i am not trying to. just trying to understand. thank you for you input

i guess i could instead of putting the port in the middle like i would like i could put it on the front on the side so i have room to wrap it around.

you aren't coming off that way at all, no worries.

A port on the front on the side is the easiest way to get the proper port area AND proper length you need.

The thing (at least one thing) you need to consider with port area is the excursion of your sub. I really don't know how you figure it up, if you are running T3 stuff, ED is a good source for that. The port area allows air to flow (duh) and the more air (more excursion) the more area you need.

The tuning is completely unrelated to that. Tuning deals with the length of the port. Yes, smaller ports need to be shorter, but you don't adjust your port area for tuning. You pick the appropriate port area as for your subs, then decide the length to tune.

I am FAR FAR FAR from a port expert, and probably have something incorrect here. I am sure someone will correct me and help you out also.

[toadking90]

two t3 600's 15s. and if i am coming off to be a jerk i am not trying to. just trying to understand. thank you for you input

i guess i could instead of putting the port in the middle like i would like i could put it on the front on the side so i have room to wrap it around.

you aren't coming off that way at all, no worries.

A port on the front on the side is the easiest way to get the proper port area AND proper length you need.

The thing (at least one thing) you need to consider with port area is the excursion of your sub. I really don't know how you figure it up, if you are running T3 stuff, ED is a good source for that. The port area allows air to flow (duh) and the more air (more excursion) the more area you need.

The tuning is completely unrelated to that. Tuning deals with the length of the port. Yes, smaller ports need to be shorter, but you don't adjust your port area for tuning. You pick the appropriate port area as for your subs, then decide the length to tune.

I am FAR FAR FAR from a port expert, and probably have something incorrect here. I am sure someone will correct me and help you out also.

ok. i understand the whole port area needs to be done first i just wasnt sure if there was a general rule of thumb to that or if its all down to pref. i message ed frequently it seems and im sure he is tired of me but he said that 35 hertz would be good for them so i just gota get back to him about area now i guess. thank for the input

[MrSkippyJ]

ok. i understand the whole port area needs to be done first i just wasnt sure if there was a general rule of thumb to that or if its all down to pref. i message ed frequently it seems and im sure he is tired of me but he said that 35 hertz would be good for them so i just gota get back to him about area now i guess. thank for the input

The general ranges are usually pretty good, that is why most people use them. You should be ok giving a slot port between 12 and 16sqin per cube. Just understand that the 2 aren't really related, it's just what most people use.

[toadking90]

ok. i understand the whole port area needs to be done first i just wasnt sure if there was a general rule of thumb to that or if its all down to pref. i message ed frequently it seems and im sure he is tired of me but he said that 35 hertz would be good for them so i just gota get back to him about area now i guess. thank for the input

The general ranges are usually pretty good, that is why most people use them. You should be ok giving a slot port between 12 and 16sqin per cube. Just understand that the 2 aren't really related, it's just what most people use.

alright another issue the torrens thing or whatever its called says 22 long for 35. 12volt's calc says 17 long for 35... which one of those do i follow?

[RAM_Designs]

The box size isn't important, what subs are your running?

???

Box size, port area(and shape), and desired tuning frequency are the three things that are going to affect how long the port needs to be.