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Message: <blockquote data-quote="Jroo" data-source="post: 8478144" data-attributes="member: 574112"><p>I think he means the ported section is ported through the rear deck or through a ski pass if you car has it. I am probably going to do this with my volvo through the ski pass in the rear seat. Good thing about 4ths in cars like this is you have no rattle at all. I wouldnt guess at ratios or tuning on a 4th at all. Have someone model one depending on the range and goals you want. I have a 4th design that has a larger sealed section and smaller ported section tuned to 60hz. I wanted a flat response from 70 down. The ratios and tuning changed based on what you are trying to achieve. If you want loud and low, you may end up with a larger ported section with a lower tuning.</p></blockquote><p></p>

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