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<blockquote data-quote="bigred78797" data-source="post: 247187" data-attributes="member: 545232"><p>Hey guys i just finished my plans of how to do it. After alot of thought and discussion with a couple other people i figured out it would be best to tune my box to 20 hz. I&#039;m doing that because of the way Audiobahns act. They take a dip in SPL then keep going up after the tuning frequency. And because i have a smaller cab lower notes seem louder. Anyway heres what it should look like. The port is running across the top going out the side. The port is like 1.5 meters long lol. There is only one problem, i had a choice between high driver excursion or very high port velocity. I chose the later of the two. I always try to keep the AV below 17 but those speakers aren&#039;t very forgiving, they either want a 3m long port or 100m/s AV. That&#039;s another reason why i went with tuning to 20hz becuase the port velocities don&#039;t start to go up high until about 19hz or so. When i was trying to tune to 50 and 40hz my&nbsp; AV were hitting about 70m/s @ 40 &amp;amp; 50 hz and that&#039;s not good.</p></blockquote><p></p>

[QUOTE="bigred78797, post: 247187, member: 545232"] Hey guys i just finished my plans of how to do it. After alot of thought and discussion with a couple other people i figured out it would be best to tune my box to 20 hz. I'm doing that because of the way Audiobahns act. They take a dip in SPL then keep going up after the tuning frequency. And because i have a smaller cab lower notes seem louder. Anyway heres what it should look like. The port is running across the top going out the side. The port is like 1.5 meters long lol. There is only one problem, i had a choice between high driver excursion or very high port velocity. I chose the later of the two. I always try to keep the AV below 17 but those speakers aren't very forgiving, they either want a 3m long port or 100m/s AV. That's another reason why i went with tuning to 20hz becuase the port velocities don't start to go up high until about 19hz or so. When i was trying to tune to 50 and 40hz my AV were hitting about 70m/s @ 40 & 50 hz and that's not good. [/QUOTE]

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