How big should a port for 15" be?

[Micah Horton 0]

I am new and am designing a ported box, it is 4.1 cubed inside for 1 15 and i want to tune low. how big should the port be so the air speed is not too fast?

[altoncustomtech 773]

That's dependent upon several things. There are calculators and formula's for figuring this too.PORT AREA CALCULATOR <-- This one is a pretty popular one. The amount of port area you plan on using depends on the xmax of the driver(s) you're going to use, tuning, and space primarily. The more port area you want to use the longer the port has to be so the more space it's going to either take up in the enclosure or the larger the enclosure has to be to account for the port. Some people don't like using really large ports for SQ related reasons, others love using the biggest port they can possibly fit for more SPL. Your goals, enclosure design plans, and space restrictions are going to dictate the end result.

[ssh 924]

How much power, and enclosure tuning? Oh and the DRIVER being used. lol

In return, I will tell you port area and port speed.

Edited February 7, 2012 by stefanhinote

[Micah Horton 0]

SSA dcon in approx 3.5 cube net box tuned to 32 HZ for now i will be using a 130w rms amp. will be upgrading to 300wrms

right now i am planning to be using a 6" diameter port that is 15" long

But i dont even have the sub in my hands yet its in the mail so this is all planning

Edited February 7, 2012 by Dubstepz

[Micah Horton 0]

I calculated the port size for a round port and it came out to be 8.24 and if i calculate the length than it has to be 36" long to be tuned correctly. i dont have that depth

[Kanaworm$ 292]

Instead of making a standard slot L- port, you can keep the length by making it a labyrinth port.

[edouble101 314]

How much power, and enclosure tuning? Oh and the DRIVER being used. lol

In return, I will tell you port area and port speed.

I have a ZCON 15D2 and a DC Audio 2.0K. Tuning to 33hz. I want to use an 8" port with aero end caps. Should I use 1 or 2?

Enclosure is size up to you really. Tell me what's best.

Thanks

[edouble101 314]

I calculated the port size for a round port and it came out to be 8.24 and if i calculate the length than it has to be 36" long to be tuned correctly. i dont have that depth

I suck ballz at designing enclosures. But if you have a size restriction make it known

[ssh 924]

How much power, and enclosure tuning? Oh and the DRIVER being used. lol

In return, I will tell you port area and port speed.

I have a ZCON 15D2 and a DC Audio 2.0K. Tuning to 33hz. I want to use an 8" port with aero end caps. Should I use 1 or 2?

Enclosure is size up to you really. Tell me what's best.

Thanks

I came up with:

Using: 50.27 in^2 Port Area

Vent Mach: 0.113

Vent Mach: 127.828 ft/sec

Vent Mach: 38.963 m/sec

That's for one 8" circular port, with flared ends I'm not sure how much exactly less you can get away with.

[ssh 924]

SSA dcon in approx 3.5 cube net box tuned to 32 HZ for now i will be using a 130w rms amp. will be upgrading to 300wrms

right now i am planning to be using a 6" diameter port that is 15" long

But i dont even have the sub in my hands yet its in the mail so this is all planning

300watts

one 6" circular port

32hz tuning

Using: 28.27 in^2 Port Area

Vent Mach: 0.044

Vent Mach: 49.289 ft/sec

Vent Mach: 15.024 m/sec

If your box is close to 3.5 cubes, with a 6" diameter port, and 15" long, after displacement, your tuning would be around 34-35hz. Which is certainly fine, it's not like a few hz is going to make a whole lot.

If your using flared ends, then disregard this last bit, I'd have to do a new calculation for that.

[edouble101 314]

How much power, and enclosure tuning? Oh and the DRIVER being used. lol

In return, I will tell you port area and port speed.

I have a ZCON 15D2 and a DC Audio 2.0K. Tuning to 33hz. I want to use an 8" port with aero end caps. Should I use 1 or 2?

Enclosure is size up to you really. Tell me what's best.

Thanks

I came up with:

Using: 50.27 in^2 Port Area

Vent Mach: 0.113

Vent Mach: 127.828 ft/sec

Vent Mach: 38.963 m/sec

That's for one 8" circular port, with flared ends I'm not sure how much exactly less you can get away with.

What enclosure size is that based on?

[ssh 924]

How much power, and enclosure tuning? Oh and the DRIVER being used. lol

In return, I will tell you port area and port speed.

I have a ZCON 15D2 and a DC Audio 2.0K. Tuning to 33hz. I want to use an 8" port with aero end caps. Should I use 1 or 2?

Enclosure is size up to you really. Tell me what's best.

Thanks

I came up with:

Using: 50.27 in^2 Port Area

Vent Mach: 0.113

Vent Mach: 127.828 ft/sec

Vent Mach: 38.963 m/sec

That's for one 8" circular port, with flared ends I'm not sure how much exactly less you can get away with.

What enclosure size is that based on?

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

[edouble101 314]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

[ssh 924]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

It's in the loudspeaker cookbook, although I'm sure it's in a thousand other books too.

[edouble101 314]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

It's in the loudspeaker cookbook, although I'm sure it's in a thousand other books too.

It is. Reading it through the third time, actually. My "bedtime" reading isnt absorbing lol

[ssh 924]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

It's in the loudspeaker cookbook, although I'm sure it's in a thousand other books too.

It is. Reading it through the third time, actually. My "bedtime" reading isnt absorbing lol

Try in the morning with a cup of coffee.

[edouble101 314]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

It's in the loudspeaker cookbook, although I'm sure it's in a thousand other books too.

It is. Reading it through the third time, actually. My "bedtime" reading isnt absorbing lol

Try in the morning with a cup of coffee.

I wake up at 4:20am. I am screwed. Glad there is a Stefan around to solve my port volume issues!

[ssh 924]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

It's in the loudspeaker cookbook, although I'm sure it's in a thousand other books too.

It is. Reading it through the third time, actually. My "bedtime" reading isnt absorbing lol

Try in the morning with a cup of coffee.

I wake up at 4:20am. I am screwed. Glad there is a Stefan around to solve my port volume issues!

You wake up at 4:20 just to get high?

I made a calc pertaining to some of the stuff: http://portsgalore.stefanhinote.com/

Might find that useful.

[Shogen 325]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

It's in the loudspeaker cookbook, although I'm sure it's in a thousand other books too.

It is. Reading it through the third time, actually. My "bedtime" reading isnt absorbing lol

Try in the morning with a cup of coffee.

I wake up at 4:20am. I am screwed. Glad there is a Stefan around to solve my port volume issues!

You wake up at 4:20 just to get high?

I made a calc pertaining to some of the stuff: http://portsgalore.stefanhinote.com/

Might find that useful.

Its been bookmarked for me since you created that thread.

[edouble101 314]

Enclosure size doesn't play any role in determining port velocity. It's all about the restriction of airflow (port area), how much air the driver is displacing (acoustical power output), and the tuning of the enclosure.

I really need to hit the books...

It's in the loudspeaker cookbook, although I'm sure it's in a thousand other books too.

It is. Reading it through the third time, actually. My "bedtime" reading isnt absorbing lol

Try in the morning with a cup of coffee.

I wake up at 4:20am. I am screwed. Glad there is a Stefan around to solve my port volume issues!

You wake up at 4:20 just to get high?

I made a calc pertaining to some of the stuff: http://portsgalore.stefanhinote.com/

Might find that useful.

Haha. I haven't smoked the dope in many many years.

Cool calc bro! I cant wait to check it out!!!!

[sefugi 166]

I made a calc pertaining to some of the stuff: http://portsgalore.stefanhinote.com/

Might find that useful.

Nice!!! Link Saved!!!

[swagger_wagon468 53]

Nothing here.

Edited December 31, 2012 by swagger_wagon468