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<blockquote data-quote="sittingheavy" data-source="post: 8403442" data-attributes="member: 666560">Hey Guys,I&#039;m trying to build a strictly burp box for a 2011 toyota sienna. I&#039;m currently running a 15-cm15d4 memphis mojo on a hifonics hercules amp. The sub is in a prefab 4ft3 vent, no clue on tuning. I&#039;m hitting 138 on the windshield on a termlab. I have plenty of room in the trunk, like 14ft3. We tested the res frequency with a sealed 12 and seem to be peaking out around 55hz. What should I be tuning the box to? I&#039;ve mocked up a few boxes in winisd and really have no clue what looks good based off of what I need.I can&#039;t seem to get a box to mock up properly in winisd.&nbsp; After messing with it the past couple days, trying to get the port area almost equal to sub cone area, this is what came out.&nbsp; Box is measuring 32&quot;x36&quot;x20&quot; with the vent measuring 18.5&quot; long x 10&quot; wide x 11.2&quot; deep.&nbsp; After vent and sub displacement, the box is coming out at 9.67^ft3 and tuned at 47.95hzSub and vent will be on top and at opposite ends of each other.&nbsp; Does this sound reasonable?This is a screen shot of what I have mocked up with the t/s specs of the mojo, what data was input into winisd, and the transfer function graph.&nbsp; Any chance anyone would care to chime in on what is wrong?&nbsp; I appeciate it.<a href="http://i.imgur.com/19aGneP.jpg" target="_blank">http://i.imgur.com/19aGneP.jpg</a></blockquote>

[QUOTE="sittingheavy, post: 8403442, member: 666560"] Hey Guys, I'm trying to build a strictly burp box for a 2011 toyota sienna. I'm currently running a 15-cm15d4 memphis mojo on a hifonics hercules amp. The sub is in a prefab 4ft3 vent, no clue on tuning. I'm hitting 138 on the windshield on a termlab. I have plenty of room in the trunk, like 14ft3. We tested the res frequency with a sealed 12 and seem to be peaking out around 55hz. What should I be tuning the box to? I've mocked up a few boxes in winisd and really have no clue what looks good based off of what I need. I can't seem to get a box to mock up properly in winisd. After messing with it the past couple days, trying to get the port area almost equal to sub cone area, this is what came out. Box is measuring 32"x36"x20" with the vent measuring 18.5" long x 10" wide x 11.2" deep. After vent and sub displacement, the box is coming out at 9.67^ft3 and tuned at 47.95hzSub and vent will be on top and at opposite ends of each other. Does this sound reasonable? This is a screen shot of what I have mocked up with the t/s specs of the mojo, what data was input into winisd, and the transfer function graph. Any chance anyone would care to chime in on what is wrong? I appeciate it. [URL="http://i.imgur.com/19aGneP.jpg"]http://i.imgur.com/19aGneP.jpg[/URL] [/QUOTE]

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