Flare port Help. Box for 15" type R.

[Parker22 10+ year member]

Here is what my box I am bulidin for a 15" type R is like.

My question is if I do a flare port with a 3.5" radius how much length do I need to add to the port to keep the tuning at 34hz and which color do I add this to in the diagram? The voilet correct? Thanks.

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[mlstrass 5,000+ posts]

You add 1/2 the distance of the radius, so 1.75" and yes add it to the violet piece...

 

[Parker22 10+ year member]

Alright thank you.

 

[djman37 5,000+ posts]

or go to http://www.psp-inc.com and look at their calc.