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Triticum's Improved Port Area Calculator


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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:

Capture.PNG.5e1a5fd2ccc75de777989c01c517ddb8.PNG

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.

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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!

 
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Sweeeet

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

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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.  

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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
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  • 3 weeks later...

lol

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

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

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