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Enclosure Design & Construction
Is this a functional ported box?
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<blockquote data-quote="Umbra" data-source="post: 8423322" data-attributes="member: 658055"><p>I hadn't thought of that, but you raise a great point. It never occurred to me the ports won't play all the same frequencies as the subs with the same authority. If that's the case, which is probably is, then side firing is definitely doable. </p><p>Currently the box is 32"x15.5"x14" (WxHxD). Behind the last seat there's only about 4 or 5 extra inches of depth (less at the edges because the lid tapers) and I wanted a bit of room so the subs and ports could breathe. I can go up, I'm not sure how much without checking, but probably a foot before it gets to the top of the seat. The width is about 50". If I redo the box in either a side-firing straight port style or slot ported I'll probably keep it about the same height and depth (so I can fold down the seats and load large items like 4'x8' boards without the box impeding) and just go wider.</p><p></p><p>I say redo because I went ahead and frankenstein'd a new box against everyone's advice. I had enough MDF on hand to extend it (but not start fresh), 4" PVC, screws, wood glue, caulk, all that stuff. I just needed the elbows. It's certainly not ideal, but I believe I can make it work. If I don't like the outcome I'll just sell it on Craigslist and start from scratch.</p><p></p><p>I have two more inquiries, but this time I have an actual picture to work with:</p><p></p><p><img src="http://i.imgur.com/ZxzCiY2l.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Would it be better to have the ports diagonal like this or horizontal? If they're diagonal they're farther away from all the walls and less in the way of the subs, but they're also diagonal. I don't know if it makes and difference, but most designs I've seen have the ports running parallel/perpendicular to walls. Then again custom shaped fiberglass enclosures don't always have flat walls and people still make ported boxes out of them.</p><p></p><p>Also, any recommendations for supporting the pipes? I was going to build a MDF column and put them through, but I knew it'd take away a bit of space I hadn't accounted for and I didn't know if such a column behind the the sub affected anything else. Right now I plan on just using wire ties since they take up so little room. I've heard of people using duct tape too.</p></blockquote><p></p>
[QUOTE="Umbra, post: 8423322, member: 658055"] I hadn't thought of that, but you raise a great point. It never occurred to me the ports won't play all the same frequencies as the subs with the same authority. If that's the case, which is probably is, then side firing is definitely doable. Currently the box is 32"x15.5"x14" (WxHxD). Behind the last seat there's only about 4 or 5 extra inches of depth (less at the edges because the lid tapers) and I wanted a bit of room so the subs and ports could breathe. I can go up, I'm not sure how much without checking, but probably a foot before it gets to the top of the seat. The width is about 50". If I redo the box in either a side-firing straight port style or slot ported I'll probably keep it about the same height and depth (so I can fold down the seats and load large items like 4'x8' boards without the box impeding) and just go wider. I say redo because I went ahead and frankenstein'd a new box against everyone's advice. I had enough MDF on hand to extend it (but not start fresh), 4" PVC, screws, wood glue, caulk, all that stuff. I just needed the elbows. It's certainly not ideal, but I believe I can make it work. If I don't like the outcome I'll just sell it on Craigslist and start from scratch. I have two more inquiries, but this time I have an actual picture to work with: [IMG]http://i.imgur.com/ZxzCiY2l.jpg[/IMG] Would it be better to have the ports diagonal like this or horizontal? If they're diagonal they're farther away from all the walls and less in the way of the subs, but they're also diagonal. I don't know if it makes and difference, but most designs I've seen have the ports running parallel/perpendicular to walls. Then again custom shaped fiberglass enclosures don't always have flat walls and people still make ported boxes out of them. Also, any recommendations for supporting the pipes? I was going to build a MDF column and put them through, but I knew it'd take away a bit of space I hadn't accounted for and I didn't know if such a column behind the the sub affected anything else. Right now I plan on just using wire ties since they take up so little room. I've heard of people using duct tape too. [/QUOTE]
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Is this a functional ported box?
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