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New build for Ct sounds strato 8’s
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<blockquote data-quote="Buck" data-source="post: 8814457" data-attributes="member: 591582"><p>The subs really don’t need a ton of room to downfire, from my experience. I’ve done quite a few downfiring designs, iirc a lot I do are like 1.5-2-2.5” of space. Downfiring with a port is a little different, because it’s a lot more pressure underneath. There’s math you can do with making sure the underneath side openings are tall enough to be slightly more than the net Sd of the woofers combined. If there’s more side wall gap than Sd of subs, then there won’t be extra pressurization of the front waves, which is what you typically want to avoid, but it kind of depends on where the subs are, like how close they are to each other and how close they are to any other object the might cover up the gaps. You can use the Sd of the subs to fairly closely determine what the minimum height is that you need. My point is that with downfiring subs only, you can probably get away with not needing a ton of gap underneath this box, helps give you more internal or wiggle room.</p><p></p><p>I would fire the port forward underneath the dash/up against the firewall or tranny hump.</p><p></p><p>You could also do maybe 2 external ports running low behind the seats firing into each rear corner at the back of the cab, like 2x 4” aeros.</p><p></p><p>I’d suggest all ports be fairly close to a wall, there’s math around that too where you can use total port area to determine the minimum amount of distance needed to not choke or effectively lengthen the port, that way you can get it as close as possible to help create more pressure around the opening, which will help the box load better, which has definitely been a problem for trucks I’ve done in the past. Sometimes trucks and the boxes people typically do due to space restrictions make a situation where the subs can unload easier, so keep that in mind.</p></blockquote><p></p>
[QUOTE="Buck, post: 8814457, member: 591582"] The subs really don’t need a ton of room to downfire, from my experience. I’ve done quite a few downfiring designs, iirc a lot I do are like 1.5-2-2.5” of space. Downfiring with a port is a little different, because it’s a lot more pressure underneath. There’s math you can do with making sure the underneath side openings are tall enough to be slightly more than the net Sd of the woofers combined. If there’s more side wall gap than Sd of subs, then there won’t be extra pressurization of the front waves, which is what you typically want to avoid, but it kind of depends on where the subs are, like how close they are to each other and how close they are to any other object the might cover up the gaps. You can use the Sd of the subs to fairly closely determine what the minimum height is that you need. My point is that with downfiring subs only, you can probably get away with not needing a ton of gap underneath this box, helps give you more internal or wiggle room. I would fire the port forward underneath the dash/up against the firewall or tranny hump. You could also do maybe 2 external ports running low behind the seats firing into each rear corner at the back of the cab, like 2x 4” aeros. I’d suggest all ports be fairly close to a wall, there’s math around that too where you can use total port area to determine the minimum amount of distance needed to not choke or effectively lengthen the port, that way you can get it as close as possible to help create more pressure around the opening, which will help the box load better, which has definitely been a problem for trucks I’ve done in the past. Sometimes trucks and the boxes people typically do due to space restrictions make a situation where the subs can unload easier, so keep that in mind. [/QUOTE]
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