Jump to content

Triticum's Improved Port Area Calculator

Recommended Posts

On 6/21/2017 at 11:16 PM, Triticum Agricolam said:


It seems really counter intuitive, but right at the point where port velocity is the highest (usually at the tuning frequency, but not always) cone size, sub quantity, or Xmax just don't matter much at all.  Right at the tuning frequency it really is the box that is playing and not the sub/s. The subs are just putting energy into the system, there is very little cone movement and virtually no output from the cone/s themselves.  Above or below that peak port velocity frequency cone area matters a lot but port velocity drops off pretty fast from that peak so port area is no longer limiting.


Here is an example of what port velocity looks like relative to frequency:


Just a couple Hz above or below that peak spot and things drop off fast.  Getting the right port area is all about optimizing for that peak.  

Thanks for breaking it down man. This will be my port area calculator from now on.

  • Like (+1 Rep) 1

The L@zy Hoe



2005 Chevy Tahoe

2,500 Watts of Highs/Mids

4 10 midrange

4 6.5 midwoofers

4 Tweeters

6 Supertweeters

2 Lithium 80AH Batteries

24K Watts

4 Custom 18s

Quad alt setup Rebuilt 250amp and 3 370s

Interior work by Lone Star Auto Works


The Build Log

Like Loud Bass? Click Here!


On 12/5/2014 at 8:06 PM, juan777 said:

See yall there, I'll be the drunk Mexican with aviators on.

On 12/6/2014 at 10:32 PM, boom50cal said:

I did see Juan LMFAO! He REALLY WAS the drunk mexican with Aviators on!

Link to comment
Share on other sites


On 11/20/2012 at 8:54 PM, AMI CUSTOMS said:

Turned mine up today at a light, guy next to me his steering wheel started moving and he looked over at me like I was a magician lol.

On 5/9/2012 at 8:45 PM, skittlesRgood said:

fuck the plating. look at what the main metal used is. you could buy unicorn blood plated terminals but if its just covering up dog shit, whats the point

On 4/10/2013 at 12:26 PM, mrd6 said:

I'll admit, half way through sanding that fiberglass in the rain and cold while I was all itchy I was definitely starting to question why i was doing this haha

  • Soon To Be
  • '04 Ford Escape
  • US Alternator 280A Hairpin
  • D4800 Under the Hood
  • (6) XP3000's in Rear
  • 1/0 SHCA & XS Power 4 runs to back
  • TORK2 kit from Tony @ CE Auto Supply
  • Pioneer DEH-80PRS
  • DD AW6.5 (2) per door
  • *Tweeter Unkown*
  • DD SS4a & C3d
  • (2) SCV4000 @ .5Ohm
  • (2) 15" Sundown Zv5
Link to comment
Share on other sites

9 hours ago, neuspeedescort said:

just plugged in a few specs of recent boxes i have built.  couple i was dead nuts on others.....well they are not so much.  but still in the window.

Can you give some examples of the boxes that didn't match up with what the calculator said?  Any info helps me make it better.  

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."


U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

Link to comment
Share on other sites

let me correct that statement a bit.  not so recent builds.  looking back they are a bit older.  before i learned a few things.  this weekend i will throw a few in WINisd and see what they look like and report back.  some where built before i had that program.

Edited by neuspeedescort
Link to comment
Share on other sites

  • 3 weeks later...


1996 GMC Sonoma
Four Fi BTL Neo 18's In 2:1 6th Order Bandpass
2 Ampere 5k's @ .5



On 10/20/2013 at 0:37 AM, KillaCam said:

Fucking with a Prius driver is like making fun of a disabled kid. Pussies.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...