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<blockquote data-quote="Kaboob" data-source="post: 852456" data-attributes="member: 560374">I&#039;m just gonna buy a q logic box for my 2 type r&#039;s and was wondering if you guys could help me out.&nbsp; The recommendation for the sub is a 3 inch diameter port 9.9 inches long.&nbsp; The box I was looking at had a 4 inch diameter port 12 inches long.&nbsp; If I just cut the 4 inch port shorter, would it all be the same in the end or would there be&nbsp; big diff?Edit:&nbsp; Crutchfield:&nbsp; Recommended Vented Box Volume: The vented box sizes recommended by Alpine range from 0.75 cu/ft to 2.0 cu/ft. Within this range, the ideal size recommended by Alpine is 1.7 cu/ft, so this is the enclosure recommended by Crutchfield. A slot port with the following dimensions should be used with the 1.7 cu/ft enclosure: W=12&quot;, H=1.25&quot;, L=21&quot;. If you cannot use a slot port in your enclosure, you will need a port tube with the following dimensions: Diameter=3&quot;, L=9.9&quot;.My box is 1.25 cubic feet per sub.&nbsp; WOuld that change anything?</blockquote>

[QUOTE="Kaboob, post: 852456, member: 560374"] I'm just gonna buy a q logic box for my 2 type r's and was wondering if you guys could help me out. The recommendation for the sub is a 3 inch diameter port 9.9 inches long. The box I was looking at had a 4 inch diameter port 12 inches long. If I just cut the 4 inch port shorter, would it all be the same in the end or would there be big diff? Edit: Crutchfield: Recommended Vented Box Volume: The vented box sizes recommended by Alpine range from 0.75 cu/ft to 2.0 cu/ft. Within this range, the ideal size recommended by Alpine is 1.7 cu/ft, so this is the enclosure recommended by Crutchfield. A slot port with the following dimensions should be used with the 1.7 cu/ft enclosure: W=12", H=1.25", L=21". If you cannot use a slot port in your enclosure, you will need a port tube with the following dimensions: Diameter=3", L=9.9". My box is 1.25 cubic feet per sub. WOuld that change anything? [/QUOTE]

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