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NEW BUILD IDEA, need help with port dimensions :)
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<blockquote data-quote="akheathen" data-source="post: 7446180" data-attributes="member: 629234"><p>to me, comes out to 26.5hz that way.....i would go with 14.5x3.5 and it would need 29.5" length to get you to 31hz....... ok, i just run some #'s..... going off what you said, i calculated an appropriate port for a 4^3 net, and it's displacement came to just over 1^3..... then i looked at your box, and that 21.5" back wall stood out (should have been 16.5") and, anyways, your gross internal, subtracting the wall thickness, is only ~4.2.... so, that would knock you town to the range of 3'^3 ported or less..... as your net, guessing on sub displacement, and what the new port would need to be...36-43"^2, imho at that point, and that may be under-estimating sub displacement...... the t/s parameters of the sub would be nice to have....</p><p></p><p>mobile- i'm all ears, it just has never seemed right to run a port like that in my book, but you are the pro builder, so i will take what you have to say. i just see the high pressure area and un-even port pressure causing a bit of turbulance and break-up as the un-even volume tries to blend with the even slot. what if the bottom half of the port allong the back wall mirrored the top, making it even from top to bottom?think that would work well?</p></blockquote><p></p>
[QUOTE="akheathen, post: 7446180, member: 629234"] to me, comes out to 26.5hz that way.....i would go with 14.5x3.5 and it would need 29.5" length to get you to 31hz....... ok, i just run some #'s..... going off what you said, i calculated an appropriate port for a 4^3 net, and it's displacement came to just over 1^3..... then i looked at your box, and that 21.5" back wall stood out (should have been 16.5") and, anyways, your gross internal, subtracting the wall thickness, is only ~4.2.... so, that would knock you town to the range of 3'^3 ported or less..... as your net, guessing on sub displacement, and what the new port would need to be...36-43"^2, imho at that point, and that may be under-estimating sub displacement...... the t/s parameters of the sub would be nice to have.... mobile- i'm all ears, it just has never seemed right to run a port like that in my book, but you are the pro builder, so i will take what you have to say. i just see the high pressure area and un-even port pressure causing a bit of turbulance and break-up as the un-even volume tries to blend with the even slot. what if the bottom half of the port allong the back wall mirrored the top, making it even from top to bottom?think that would work well? [/QUOTE]
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NEW BUILD IDEA, need help with port dimensions :)
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