1. ## help me tune again

1 rockford fosgate punch z 10"
box dimensions {exterior}
width...........26.5
height..........14
top depth......5.25
bottom depth.....8
rf T/S parameters
would like the box to be tuned to 33 hz.
i need the port dimensions...thanx
http://www.rockfordfosgate.com/scrip...ted=1065551422

2. ## Re: help me tune again

First you need the interior dimensions, then use this to find the port length.

3. ## Re: help me tune again

Originally Posted by bigwheel15
First you need the interior dimensions, then use this to find the port length.
Wow. I'm glad you found this. Since loudspeakers101.com went down I was looking for it. This calculator is accurate...a lot better than WinISD. I have done calculations that have the same outcome as this one. The only thing you need to remember when using it is that you need to do it twice. Once using the internal box volume (- sub displacement) and when you get your port length, find the port displacement, subtract that from your box volume number that you used the first time, and then do it again using the new box volume to find you final port length. It also accounts for port correction as well.

4. ## Re: help me tune again

PJ: what is the driver displacement? The T/S doesn't give it. Give me the displacement, also try to figure it out. Try using a 3" port. Your box is already 0.68cu' to start out with. When you post the displacement I will do the math also. now that we have a calculator to work with it should be pretty easy to do.

5. ## Re: help me tune again

Originally Posted by Trixter
PJ: what is the driver displacement? The T/S doesn't give it. Give me the displacement, also try to figure it out. Try using a 3" port. Your box is already 0.68cu' to start out with. When you post the displacement I will do the math also. now that we have a calculator to work with it should be pretty easy to do.
i really have no idea on sub displacement...this box is not for me and thats all i could find on the internet on the sub...also i dont wanna use pvc when building the box i want to do the same kind of port that yall help me figure out for my 2 sonys if possible...thanx

6. ## Re: help me tune again

also i have no idea how to use that calculater

7. ## Re: help me tune again

Well then disgrgard that last PM I sent you. I don't have time now to do the box but I will try and get back to you on it.

8. ## Re: help me tune again

Originally Posted by Jmac
According to BBP6, driver displacement = 0.06 ft^3 ...

I don't use calculators, they **** me off ...
I think I like the paper and pencil way myself. I tried that calc. again and I have come to this conclusion.

9. ## Re: help me tune again

Originally Posted by Trixter
Well then disgrgard that last PM I sent you. I don't have time now to do the box but I will try and get back to you on it.
were you referring to me...because i have no pm from you

10. ## Re: help me tune again

I meant pj, but since you didn't get nevermind disregarding it.

Use a 2" piece of pvc that is 8" long.

Or a 3" piece that is 21" long.

11. ## Re: help me tune again

not a fan of PVC ports myself...too easy to get port noise unless you take a lot of precautions in routing the edges down smooth...

slot ports rule

12. ## Re: help me tune again

Originally Posted by Trixter
I meant pj, but since you didn't get nevermind disregarding it.

Use a 2" piece of pvc that is 8" long.

Or a 3" piece that is 21" long.
what about with a slore port...like with the port in the corner of the box...2 sides of the box = 2 sides of the port and 2 separate pieces of wood for the other 2 pieces of the port...i really dont wanna fool with pvc cuz i've heard of bad port noise

13. ## Re: help me tune again

Originally Posted by pj_chevy03
what about with a slore port...like with the port in the corner of the box...2 sides of the box = 2 sides of the port and 2 separate pieces of wood for the other 2 pieces of the port...i really dont wanna fool with pvc cuz i've heard of bad port noise
i meant slot port... could u give me the dimensions for a port that would be coming our the top of the box in the corner of the box where 2 walls of the box make up 2 sides of the port or if that cant be done... have it where a wall only makes up one side of the port... but preferably in the corner of the box...thanx

14. ## Re: help me tune again

bump...........

15. ## Re: help me tune again

Honestly, I don't thihnk you will have any problems with port noise because the enclosure and the port are so small. If you were to go with a slot port, you will take up more displacement, in turn making the port longer to keep the box tuned. If your set on not going with PVC port you can either go with a bigger box to accomidate a slot port or you go with a precision port. http://www.partsexpress.com/webpage....7&WebPage_ID=3

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