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db drag street stock build in the 2 door geo metro
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<blockquote data-quote="akadj" data-source="post: 8405479" data-attributes="member: 554298"><p>Soooo onto building a new box for 2 12's but this time smaller than the last bunch, around 3.5 cubes before displacement but with the same subs up and port up design as that had been the best set up so far. Port had to be a little smaller mouth opening as well to keep the frequency the same.</p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150129_132208_zpsspp15cal.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150129_132208_zpsspp15cal.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>My score went down, but so did the amount of power because box rise was getting higher.. So when I turned it up and clamped the same power I got the same number.</p><p></p><p>So I took about a month of from testing. Even though I'm not testing it I'm still thinking and trying to figure out what I can do different. Then I came up with the next design and had to try it out asap.</p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_114927_zpst47kkncq.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_114927_zpst47kkncq.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_114935_zpsbv5wavgn.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_114935_zpsbv5wavgn.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_143942_zpsenebbmny.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_143942_zpsenebbmny.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_145324_zpsjmd6qwn2.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_145324_zpsjmd6qwn2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />[/uRkw</a></p><p></p><p>I think this one looked cool as ****! And it actually turned out to be the second loudest set up I had, again raising box rise and lowering spl, but I had the head room in the amp to turn it up and clamp 1kw with the score still hanging around the same.</p><p></p><p>Then while I was looking at it, it dawned on me... Street stock is only 1kw and onle ONE WOOFER!! ahhh I totally forgot and was into raising spl and keeping the power down that I forgot the basic rules.. So with one day before the competition I had to try and some how figure out with the best box I had, how was I going to use one woofer... I've got a ton of gear around my place.. 6 - 18's 4 - 15's 8 - 12's 2 - 10's 5 - 8's 10 - 6's.. It's just an explosion of woofers in my garage. But I knew that the 4.12 cubic foot box was way to big for a single 10 or 12.. But the box height was a bit small for 15".. So with the wood I laying around I Frankenstein the box to make one for a 15" woofer to stay into street stock 1kw.</p><p></p><p><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html" target="_blank"> </a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_145742_zpsy2p9vvbr.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150617_145742_zpsy2p9vvbr.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html" target="_blank"> </a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_145816_zpsceekqfa9.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150617_145816_zpsceekqfa9.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html" target="_blank"> </a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html" target="_blank">Then I start adjusting the port length and try moving the box so its sub up and port back, or sub forward and port up.. And find that when I have the sub up and port back on low power its louder but when I really turn it up and get the port breathing it lower spl, due to the port being right against the hatch.</a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html" target="_blank"> </a></p><p></p><p><a href="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150618_003843_LLS_zpszptbwfhf.jpg.html" target="_blank"><img src="http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150618_003843_LLS_zpszptbwfhf.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p></blockquote><p></p>
[QUOTE="akadj, post: 8405479, member: 554298"] Soooo onto building a new box for 2 12's but this time smaller than the last bunch, around 3.5 cubes before displacement but with the same subs up and port up design as that had been the best set up so far. Port had to be a little smaller mouth opening as well to keep the frequency the same. [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150129_132208_zpsspp15cal.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150129_132208_zpsspp15cal.jpg[/IMG][/URL] My score went down, but so did the amount of power because box rise was getting higher.. So when I turned it up and clamped the same power I got the same number. So I took about a month of from testing. Even though I'm not testing it I'm still thinking and trying to figure out what I can do different. Then I came up with the next design and had to try it out asap. [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_114927_zpst47kkncq.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_114927_zpst47kkncq.jpg[/IMG][/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_114935_zpsbv5wavgn.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_114935_zpsbv5wavgn.jpg[/IMG][/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_143942_zpsenebbmny.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_143942_zpsenebbmny.jpg[/IMG][/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150609_145324_zpsjmd6qwn2.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150609_145324_zpsjmd6qwn2.jpg[/IMG][/uRkw[/URL] I think this one looked cool as ****! And it actually turned out to be the second loudest set up I had, again raising box rise and lowering spl, but I had the head room in the amp to turn it up and clamp 1kw with the score still hanging around the same. Then while I was looking at it, it dawned on me... Street stock is only 1kw and onle ONE WOOFER!! ahhh I totally forgot and was into raising spl and keeping the power down that I forgot the basic rules.. So with one day before the competition I had to try and some how figure out with the best box I had, how was I going to use one woofer... I've got a ton of gear around my place.. 6 - 18's 4 - 15's 8 - 12's 2 - 10's 5 - 8's 10 - 6's.. It's just an explosion of woofers in my garage. But I knew that the 4.12 cubic foot box was way to big for a single 10 or 12.. But the box height was a bit small for 15".. So with the wood I laying around I Frankenstein the box to make one for a 15" woofer to stay into street stock 1kw. [IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg[/IMG] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html"] [/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_145742_zpsy2p9vvbr.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150617_145742_zpsy2p9vvbr.jpg[/IMG][/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html"] [/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_145816_zpsceekqfa9.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150617_145816_zpsceekqfa9.jpg[/IMG][/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html"] [/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html"]Then I start adjusting the port length and try moving the box so its sub up and port back, or sub forward and port up.. And find that when I have the sub up and port back on low power its louder but when I really turn it up and get the port breathing it lower spl, due to the port being right against the hatch.[/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150617_130909_zpsog9jldfe.jpg.html"] [/URL] [URL="http://s1225.photobucket.com/user/DanielKnew/media/Mobile%20Uploads/20150618_003843_LLS_zpszptbwfhf.jpg.html"][IMG]http://i1225.photobucket.com/albums/ee397/DanielKnew/Mobile%20Uploads/20150618_003843_LLS_zpszptbwfhf.jpg[/IMG][/URL] [/QUOTE]
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