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Any length difference when using 2 ports instead of 1?


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I am currently making my ports for my box, and I have no choice but to make 2 separate ports. The specs call for 110 square inches of port 22.5" long. Now if i make 2 55 square inch ports will they still be 22.5" long? I thought it wouldnt matter because they added up to the same area but someone said i would need to recalculate the lengths. Can anyone shed some light on this for me.

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Depends -

If you are talking about a 60 sqin port vs. 2 30 sqin ports, no they are not double the length.

If you are talking about a 60 sqin port vs. 2 60 sqin ports, yes they are double the length.

You really have to just calculate length based on 1 or two ports if there is some different ratio between the sizes.

Current system:

1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s

Previous systems:

2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz.

1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz.

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