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<blockquote data-quote="Jeffdachef" data-source="post: 8283372" data-attributes="member: 650438">Its cool man no sweat. With a bigger enclosure, the port lengths are going to be shorter if you want to keep the 33-35 hz tuning, making it longer will give you a much lower tuning. with only 3 4 inch aeros, your gonna be a little bit short on port area and have some port noise going on. with 3 4&quot; aeros, you can only go 6 inches long before the tuning starts going down. To be 4 inch away from the back, you&#039;ll be down to 24hz tuning for your 3 4&quot; aeros.we can have a 36W 15.5H 19D that equals to 4.9 cubic foot gross, add in enough bracing so it would equal to 4.4 cubic feet then you can use two 6inch 13&quot; long aeros and it would give you between 33-34 hz tuning and 3.98 cubic feet net after port displacement.To get an accurate read on your bracing displacement, just calculate how much volume each piece will take up, for rectangles (L x W x H) divided by 1728 and subtract from the 4.9 cubic feet. Or (3.14 X radius X length) divided by 1728 for circular poles.</blockquote>

[QUOTE="Jeffdachef, post: 8283372, member: 650438"] Its cool man no sweat. With a bigger enclosure, the port lengths are going to be shorter if you want to keep the 33-35 hz tuning, making it longer will give you a much lower tuning. with only 3 4 inch aeros, your gonna be a little bit short on port area and have some port noise going on. with 3 4" aeros, you can only go 6 inches long before the tuning starts going down. To be 4 inch away from the back, you'll be down to 24hz tuning for your 3 4" aeros. we can have a 36W 15.5H 19D that equals to 4.9 cubic foot gross, add in enough bracing so it would equal to 4.4 cubic feet then you can use two 6inch 13" long aeros and it would give you between 33-34 hz tuning and 3.98 cubic feet net after port displacement. To get an accurate read on your bracing displacement, just calculate how much volume each piece will take up, for rectangles (L x W x H) divided by 1728 and subtract from the 4.9 cubic feet. Or (3.14 X radius X length) divided by 1728 for circular poles. [/QUOTE]

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