round ports for my bandpass

[frogcase2002 10+ year member]

Just did a bandpass that's 2.1 sealed and around 4.2 ported. What size round port/ports would I want. Going to be porting through the rear deck. . And also will there be a difference in how much is external and inside other than internal volume

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[frogcase2002 10+ year member]

Right now I have removable square port firing into cabin through the fold down seats. I'm just thinking I can get louder with it loading off the rear window and will be easyer to seal off trunk

 

[frogcase2002 10+ year member]

Also. Does it effect anything cutting out some of the rear deck (where the back speakers go)

 

[frogcase2002 10+ year member]

Or should I do a square or rectangle through the rear deck

 

[brandon_s0854 10+ year member]

Also. Does it effect anything cutting out some of the rear deck (where the back speakers go)

Well, it'll affect the structural integrity of the rear deck, but I don't think it's anything to worry about.

 

---------- Post added at 06:54 PM ---------- Previous post was at 06:54 PM ----------

 

What size and how many subs to answer your other questions.

 

[frogcase2002 10+ year member]

Well, it'll affect the structural integrity of the rear deck, but I don't think it's anything to worry about.[color="Silver"---------- Post added at 06:54 PM ---------- Previous post was at 06:54 PM ----------

[/color]What size and how many subs to answer your other questions.

one 15"zcon on 3000 watts

 

[brandon_s0854 10+ year member]

General rule of thumb is half cone area. You could do a single 10" round port. If you're using flared ports, and I'm talking something with a good flare on it like the psp aeroports. You can get away with less. You could do two of their 6" ports. You can find them on Parts Express or even eBay.

 

[frogcase2002 10+ year member]

General rule of thumb is half cone area. You could do a single 10" round port. If you're using flared ports, and I'm talking something with a good flare on it like the psp aeroports. You can get away with less. You could do two of their 6" ports. You can find them on Parts Express or even eBay.

I'm probley wanting to do either square/rectangle port with mdf or use just pvc cause I'm going to be making a lot of them to get the tuning right and keep one for daily and one for burps

 

[brandon_s0854 10+ year member]

Well 10" pvc if you can find it. Or a 90 in^2 slot port; doesn't matter either way. I'm assuming anywhere from 80-100 in^2 would be fine.

 

[frogcase2002 10+ year member]

Well 10" pvc if you can find it. Or a 90 in^2 slot port; doesn't matter either way. I'm assuming anywhere from 80-100 in^2 would be fine.

You think that much for 4 cubes

 

[brandon_s0854 10+ year member]

You think that much for 4 cubes

You could probably get away with less, but like I said, general rule of thumb for 4th orders is half cone area. I have 67.5 in^2 in mine and it's only 2.25cf. Definitely don't do less than 60. It depends on what you're tuning it to as well. The lower you tune it, the less port you really need.

 

[frogcase2002 10+ year member]

You could probably get away with less, but like I said, general rule of thumb for 4th orders is half cone area. I have 67.5 in^2 in mine and it's only 2.25cf. Definitely don't do less than 60. It depends on what you're tuning it to as well. The lower you tune it, the less port you really need.

I think I mite be able to get a 6 by 10 in the rear deck. How far do you think I need to keep the port away from the window?

 

[brandon_s0854 10+ year member]

I think I mite be able to get a 6 by 10 in the rear deck. How far do you think I need to keep the port away from the window?

I'm not sure. I've never ported through rear deck before. Maybe someone else can chime in on this. There's no way you could do a 6x12 port? 60 just seems a little small. How much power are you running again?

 

[frogcase2002 10+ year member]

I'm not sure. I've never ported through rear deck before. Maybe someone else can chime in on this. There's no way you could do a 6x12 port? 60 just seems a little small. How much power are you running again?

3000..

 

[brandon_s0854 10+ year member]

What do you want to tune to? I'm going to put this in WinISD and look up port velocities for ya.