Help with box design

[Slam-Hog]

Hey guys, first post on the forum. //content.invisioncic.com/y282845/emoticons/bigwave.gif.16324171cad2db62cf4f16568b038478.gif

I got a PPI pcx122. Recommended box specs for a ported box is 1.25cf with a 2.6" diameter port.

I've always been told to fallow manufacturers recommendations, but wtf is with the 2.6" port? That seems way under anything i've ever come across. Not to mention the 1.25cf box size, which is also slightly smaller than what i've built in the past.

I'd like a ported box for maximum efficiency, but i'm still somewhat concerned about SQ, so I plan on tuning the box to 32 or so hz.

So basically my question here is, should I fallow manufacturer recommendations, or just build a 1.8cf box with a 4" port and tune the port to 32hz?

What are the ups and downs of larger/smaller box size and larger/smaller port diameter?

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[09civic 5,000+ posts]

link to sub?