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<blockquote data-quote="Sguirrelfeather" data-source="post: 8873676" data-attributes="member: 668995">I don&#039;t know if I&#039;m over thinking things, if I&#039;m doing it wrong, or what, but I just can&#039;t seem to get the hang of figuring out a port.Normally I pay to have someone else design my boxes and then I&#039;ll build em, but my wife finally wanted a small enclosure in the back of her truck and since that&#039;s gotta be a custom built thing (due to varying measurements cuz it&#039;s under the seat and the seat was raised) I figured I&#039;d give this a shot myself. I&#039;m currently only at the estimation stage of how big the box will be. I did measurements four times to be sure I was accurate. I use Triticum&#039;s port area calculator to determine port size and then a port length calculator (tried several to make sure) and HOLY CRAP the port is bigger than the box!I know I can go down in port area to get a shorter port length, but then I run the risk of getting port noise. I tried splitting the difference but the port is still just really long. The box originally was about 2.15 cubes and had an odd shape because it&#039;s an under rear seat box and there&#039;s a transmission hump. She&#039;ll be running 2 HDS 2.2 8s in it and will have about 1300 watts total going to them. When I did all the calcs, subtracted the port volume from the box volume, recalculated, etc it almost makes more sense to just do two separate boxes about .9 cubes each and connect them with a common port, but even then I&#039;d wind up with something like four feet of 5&quot; diameter port for each one, and I just don&#039;t have that much room. lolSo, what do the infinitely more experienced people on here have for me? Please educate this old, tired mind!</blockquote>

[QUOTE="Sguirrelfeather, post: 8873676, member: 668995"] I don't know if I'm over thinking things, if I'm doing it wrong, or what, but I just can't seem to get the hang of figuring out a port. Normally I pay to have someone else design my boxes and then I'll build em, but my wife finally wanted a small enclosure in the back of her truck and since that's gotta be a custom built thing (due to varying measurements cuz it's under the seat and the seat was raised) I figured I'd give this a shot myself. I'm currently only at the estimation stage of how big the box will be. I did measurements four times to be sure I was accurate. I use Triticum's port area calculator to determine port size and then a port length calculator (tried several to make sure) and HOLY CRAP the port is bigger than the box! I know I can go down in port area to get a shorter port length, but then I run the risk of getting port noise. I tried splitting the difference but the port is still just really long. The box originally was about 2.15 cubes and had an odd shape because it's an under rear seat box and there's a transmission hump. She'll be running 2 HDS 2.2 8s in it and will have about 1300 watts total going to them. When I did all the calcs, subtracted the port volume from the box volume, recalculated, etc it almost makes more sense to just do two separate boxes about .9 cubes each and connect them with a common port, but even then I'd wind up with something like four feet of 5" diameter port for each one, and I just don't have that much room. lol So, what do the infinitely more experienced people on here have for me? Please educate this old, tired mind! [/QUOTE]

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