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<blockquote data-quote="CBFryman2" data-source="post: 2467645" data-attributes="member: 565445">Just ran some numbers. 9&quot;x34&quot; with a 1&quot; space top and bottom and a 2&quot; space on each side for the bolts will allow for 210sqin of port area.If yo uhave a TL on hand Build a port as deep as it will allow and run a sweep from 20-80Hz. Shorten the port in 2&quot; incraments untill you get the flattest responce on the TL. That will be your daily plug (who cares about tuning?).Next find a song you want to bassrace with. and crunch the numbers to tune for it, start a little low and shorten untill you get the best average score you can muster. Keep shortening untill you start to loose on the song. Build another plug as long as the port was when you did your loudest run.Next find your peak frequincy with your daily port and if it is above the peak of your bassrace song use your bassrace test port and shorten it untill you get your best peak. That will be your dB Drag port (dB Drag is always fun and you know you will want to spend the extra $10 to compeat in it in 1x and 2x competitions).That is what I would do personally. Just a suggestion. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</blockquote>

[QUOTE="CBFryman2, post: 2467645, member: 565445"] Just ran some numbers. 9"x34" with a 1" space top and bottom and a 2" space on each side for the bolts will allow for 210sqin of port area. If yo uhave a TL on hand Build a port as deep as it will allow and run a sweep from 20-80Hz. Shorten the port in 2" incraments untill you get the flattest responce on the TL. That will be your daily plug (who cares about tuning?). Next find a song you want to bassrace with. and crunch the numbers to tune for it, start a little low and shorten untill you get the best average score you can muster. Keep shortening untill you start to loose on the song. Build another plug as long as the port was when you did your loudest run. Next find your peak frequincy with your daily port and if it is above the peak of your bassrace song use your bassrace test port and shorten it untill you get your best peak. That will be your dB Drag port (dB Drag is always fun and you know you will want to spend the extra $10 to compeat in it in 1x and 2x competitions). That is what I would do personally. Just a suggestion. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] [/QUOTE]

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