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<blockquote data-quote="Buck" data-source="post: 8758296" data-attributes="member: 591582">It’s 2 Sundown NSv5 12’s iirc. Tuned pretty low. Fairly big slot port off to the left side.&nbsp; Something like 30% of that boxes internal airspace is the port, super long port.Firing forward in trunks works, if the conditions are right. Big power really helps. These subs perform better in a larger box -and larger port with their huge Xmax and 3000w Rms rating. If you don’t have a ton of power, then you have to do the box a certain way to make sure there’s enough pressure for woofer loading. It’s all case by case, or that’s how I treat it. It’s taken a lot of studying to understand sound, like I do now.There’s impedance changes relative to relative air densities; it depends on the location of air, and whether there’s a tuning to said air mass that’s relevant to the bandwidth being played.&nbsp; I don’t think people understand, with some of my boxes, why things are the way they are.&nbsp; Not sure how much I want to explain; I could ramble forever.&nbsp; Buck studies physics constantly <img class="smilie smilie--emoji" loading="lazy" alt="😂" title="😂" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f602.png" />Impedance is sososososo much deeper than just box size, in ported boxes.&nbsp; That’s why your port on your box was exactly the size it was; it was right where I wanted it, based on what you had told me you wanted to hear.&nbsp; That’s why it was that shape, too.&nbsp; It was just the best way to do it, IMO.</blockquote>

[QUOTE="Buck, post: 8758296, member: 591582"] It’s 2 Sundown NSv5 12’s iirc. Tuned pretty low. Fairly big slot port off to the left side. Something like 30% of that boxes internal airspace is the port, super long port. Firing forward in trunks works, if the conditions are right. Big power really helps. These subs perform better in a larger box -and larger port with their huge Xmax and 3000w Rms rating. If you don’t have a ton of power, then you have to do the box a certain way to make sure there’s enough pressure for woofer loading. It’s all case by case, or that’s how I treat it. It’s taken a lot of studying to understand sound, like I do now. There’s impedance changes relative to relative air densities; it depends on the location of air, and whether there’s a tuning to said air mass that’s relevant to the bandwidth being played. I don’t think people understand, with some of my boxes, why things are the way they are. Not sure how much I want to explain; I could ramble forever. Buck studies physics constantly 😂 Impedance is sososososo much deeper than just box size, in ported boxes. That’s why your port on your box was exactly the size it was; it was right where I wanted it, based on what you had told me you wanted to hear. That’s why it was that shape, too. It was just the best way to do it, IMO. [/QUOTE]

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