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2000SPL Box Design
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<blockquote data-quote="SSS 18734" data-source="post: 1132802" data-attributes="member: 559710"><p>I posted a thread about this a while back, but turns out I entered the wrong T-S parameters //content.invisioncic.com/y282845/emoticons/blush.gif.99bc659ee2012b7d826165e26fb5eebe.gif , and thanks to member PowerNAudio i've been making a lot of progress.</p><p></p><p>Heres a new graph. The response is relatively flat, and has a nice little peak around 32hz. I'm going less for flat response and more for low end here. Basically, I want it to rattle the sh*t out of the car. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p><p></p><p>Box will be ~1.5 cu.ft. per sub, tuned @33hz</p><p></p><p>Slot ported: 3" wide port, 10" tall, 40" length.</p><p></p><p>Response curve is like so:</p><p></p><p><a href="http://imageshack.us" target="_blank"><img src="http://img50.imageshack.us/img50/8416/untitled1copy4tw.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>Im trying to make this box as shallow as possible, with a divider in the center so both subs have seperate airspace, with both ports firing out of the middle of the box so it will be easier to make indented sides. Plenty of bracing also.</p><p></p><p>I've got a few questions.</p><p></p><p>1. Would the port I am planning on using be large enough to avoid port noise? Is port area calculated by figuring the entire area of the port througout its length, or just the area of the opening? also, during the design process, I may end up increasing the height of the port, giving me even more port area.</p><p></p><p>2. If possible, I'd like to have the subs firing upwards. However, making the port fire upwards would be completely unpractical, as I'd need one hell of a long port. Would I be likely to experience any cancellation having the subs fire upward, while having the port fire to the rear? anyone ever had any experience with this type of setup?</p><p></p><p>3. This box will likely weigh well over 100 lbs. My current one is pretty small and I can barely move it around as it is. Might I be better off making two seperate boxes? I take them in and out pretty often.</p></blockquote><p></p>
[QUOTE="SSS 18734, post: 1132802, member: 559710"] I posted a thread about this a while back, but turns out I entered the wrong T-S parameters [IMG]//content.invisioncic.com/y282845/emoticons/blush.gif.99bc659ee2012b7d826165e26fb5eebe.gif[/IMG] , and thanks to member PowerNAudio i've been making a lot of progress. Heres a new graph. The response is relatively flat, and has a nice little peak around 32hz. I'm going less for flat response and more for low end here. Basically, I want it to rattle the sh*t out of the car. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Box will be ~1.5 cu.ft. per sub, tuned @33hz Slot ported: 3" wide port, 10" tall, 40" length. Response curve is like so: [URL="http://imageshack.us"][IMG]http://img50.imageshack.us/img50/8416/untitled1copy4tw.jpg[/IMG][/URL] Im trying to make this box as shallow as possible, with a divider in the center so both subs have seperate airspace, with both ports firing out of the middle of the box so it will be easier to make indented sides. Plenty of bracing also. I've got a few questions. 1. Would the port I am planning on using be large enough to avoid port noise? Is port area calculated by figuring the entire area of the port througout its length, or just the area of the opening? also, during the design process, I may end up increasing the height of the port, giving me even more port area. 2. If possible, I'd like to have the subs firing upwards. However, making the port fire upwards would be completely unpractical, as I'd need one hell of a long port. Would I be likely to experience any cancellation having the subs fire upward, while having the port fire to the rear? anyone ever had any experience with this type of setup? 3. This box will likely weigh well over 100 lbs. My current one is pretty small and I can barely move it around as it is. Might I be better off making two seperate boxes? I take them in and out pretty often. [/QUOTE]
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