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<blockquote data-quote="duanebro" data-source="post: 7650316" data-attributes="member: 636988">I had some extra time tonight so I ran the numbers:<img src="http://i1091.photobucket.com/albums/i386/duanebrow/Car%20Audio%20Designs/aqHDC310comparingboxes.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The black line is the first box.Red is the current box.And green is my suggested design.The specs used were provided by Audio Que. No break in and with alum. coils. In car response will be different from these of course, this is just to show the difference in the boxes. The subs do drop off very fast under tuning because they are a low Q design. So to get low these need to be tuned low. My suggested box is 2cf net tuned to 30hz. It will not be as loud, you are losing ~7db at 40hz. But the sound should be more even. Plus group delay and phase angle are affected by the lower tuning, this could make the system sound better. I say could because it might not have that much effect once installed.I would try to use the current box as a test box to see what you like before building anything new.FWIW using the peak as a reference, the current box is 12db down in the current box. //content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif</blockquote>

[QUOTE="duanebro, post: 7650316, member: 636988"] I had some extra time tonight so I ran the numbers: [IMG]http://i1091.photobucket.com/albums/i386/duanebrow/Car%20Audio%20Designs/aqHDC310comparingboxes.jpg[/IMG] The black line is the first box. Red is the current box. And green is my suggested design. The specs used were provided by Audio Que. No break in and with alum. coils. In car response will be different from these of course, this is just to show the difference in the boxes. The subs do drop off very fast under tuning because they are a low Q design. So to get low these need to be tuned low. My suggested box is 2cf net tuned to 30hz. It will not be as loud, you are losing ~7db at 40hz. But the sound should be more even. Plus group delay and phase angle are affected by the lower tuning, this could make the system sound better. I say could because it might not have that much effect once installed. I would try to use the current box as a test box to see what you like before building anything new. FWIW using the peak as a reference, the current box is 12db down in the current box. [IMG]//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif[/IMG] [/QUOTE]

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