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<blockquote data-quote="deadgame1" data-source="post: 7471680" data-attributes="member: 636305">i have four MA121XQ subs that I want to build a ported enclosure for. The manual recommends 3 cu ft. for one sub so am I correct in assuming that i need an enclosure with 12 cu ft ? Also it recommends 25 sq/in. port area and port length of 14 inches so does this mean i could do 1 port that has 100 sq/in of port area. i am a little confused because when i punch all of my measurements into the Torres box tuning calculator i have to use&nbsp; different dimensions for the port to tune to 35Hz. These are the outer dimensions that i have and will be using 3/4 mdfHeight&nbsp; 23&quot;width&nbsp;&nbsp; 36&quot;depth&nbsp;&nbsp; 32&quot;Port dimesionsHeight 20&quot;Width&nbsp;&nbsp; 5&quot;Lenght&nbsp; 9&quot;This will be in a full size K5 Blazer if that matters at all . Any help you guys could give would be greatly appreciated.</blockquote>

[QUOTE="deadgame1, post: 7471680, member: 636305"] i have four MA121XQ subs that I want to build a ported enclosure for. The manual recommends 3 cu ft. for one sub so am I correct in assuming that i need an enclosure with 12 cu ft ? Also it recommends 25 sq/in. port area and port length of 14 inches so does this mean i could do 1 port that has 100 sq/in of port area. i am a little confused because when i punch all of my measurements into the Torres box tuning calculator i have to use different dimensions for the port to tune to 35Hz. These are the outer dimensions that i have and will be using 3/4 mdf Height 23" width 36" depth 32" Port dimesions Height 20" Width 5" Lenght 9" This will be in a full size K5 Blazer if that matters at all . Any help you guys could give would be greatly appreciated. [/QUOTE]

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