4th order bandpass? hints, tips, tricks? need advise.

[Death By Bass 10+ year member]

looking to do a 4th order in a sedan, dont like trunk rattle, and ported enclosures have never had a tight enough response for my liking.

so, where does one start with a 4th order?

front or rear chamber larger? tune higher? or lower?

my problem is, I want a good response down to around 30Hz, but have limited space.

your input would be much appreciated!

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[NeverEnuffBass 10+ year member]

PM 80 Inches

 

[Death By Bass 10+ year member]

PM 80 Inches

yeah yeah, thats what everyone says... haha

I have come up with a design, which is probably too small, but I might built it anyway, and see how it goes //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif