Triticum's Improved Port Area Calculator

[Triticum Agricolam]

1 hour ago, Grasshopper said:

I looked into your new calculator and jumped through all of the necessary hoops to be able to ask this question so am curious what your reply will be but I have a feeling that I know what you'll say. Lol. Anyway, when entering net volume in the calculator since I have a 4th order will I enter volume for entire enclosure ported and sealed? Or just ported side? Total it's roughly 18 cubes, ported its roughly 12 cubes. The generated numbers change significantly from 12 to 18 so clarification would be appreciated. Thank you

Just the ported section.  

[77-AUDIO]

Yeah for me to get the tuning I desire with this calc, my port would be so long it would look like a exhaust stack sticking out og my roof.  lol.

but its not bad when you are doing a big build and lots of power.  it close to a box i built for 4 15" dc audio xl's

 

[blackrado09]

Really stupid question but, how do I convert the measurements to my application?

I will be using a 4" aero and it says I need 38 sq in in total..So how long will the port need to be?

Sorry, first enclosure build.

[Triticum Agricolam]

5 hours ago, blackrado09 said:

Really stupid question but, how do I convert the measurements to my application?

I will be using a 4" aero and it says I need 38 sq in in total..So how long will the port need to be?

Sorry, first enclosure build.

If the calculator says you need 38" sq in total, that means you really don't want to use a single 4" aero since it only has about 12.5 sq in.  Three 4" ports would work.  The length of the port doesn't factor into the equation for port area.  Length becomes relevant when it comes to tuning the port.  

[blackrado09]

Ok, I see. Thanks a lot for the help.

[Antoni Čović]

Hey, great calculator! but I just have one question: for "total input power" do I put my system clamped watts or Subwoofer spec watts? Thanks

[ckeeler11]

6 hours ago, Antoni Čović said:

Hey, great calculator! but I just have one question: for "total input power" do I put my system clamped watts or Subwoofer spec watts? Thanks

You would put n the power that the enclosure would see.

[Antoni Čović]

On 12/13/2018 at 8:22 PM, ckeeler11 said:

You would put n the power that the enclosure would see.

So then clamped watts?

[Triticum Agricolam]

21 hours ago, Antoni Čović said:

So then clamped watts?

It depends on how the amp was clamped. Are you taking about clamped watts like what is done on an AD-1 (Watts into a resistive load)? If so then that would the number you use. If you are talking about how many watts YOUR amp was measured to put out into YOUR subs (watts into a reactive load), that number is going to be low.  The problem is when you clamp a system impedance rise is going to reduce the amount of watts your amp puts out, but it doesn’t reduce the amount of port area you need. I’m kind of oversimplifing things, but hopefully you get the idea. 

[06RTCharger]

What should i enter for net volume if i dont know what the size and length of the port will be yet? A port could end up displacing a whole cube or more.