How do I find the port length and diameter using pvc?

[ace_800 5,000+ posts]

Trying to find out if I should use 2 aero ports of 3" in diameter or 1 port of 4". They both would be around the same length for 32htz. Is there going to be a difference? Thanks

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[W8 a minute 10+ year member]

Too many variables here.

What sub?

T/S parameters?

Net volume of box?

Tuning frequency?

I have a hard time believing they"ll be "around the same length" and still have the same tuning frequency.

 

[ace_800 5,000+ posts]

The tc9 subs that were being sold on here

3.2^3

approx 32htz

I was using the psp-inc calculator

Its coming up 12.45 with 1 4"

and

14.98 for 2 3"

 

[ace_800 5,000+ posts]

Anyone?