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<blockquote data-quote="brown7348" data-source="post: 7809111" data-attributes="member: 641704"><p>Thanks, you guys are very helpful, and your right, with this 3in port it pushes out a ton of air, almost seems like it would have to be choking the sub its soo much air coming from the port, when i first built the box i guessed a bit on the port length and it was a tad too long i came out tuned to 27.xxx hz with the port 20in long, i cut it down to 16in and it brought me up to 30.xx hz. i know it gained some decibles but not much, im guessing ill have to find out if i have the room to go ahead and add a 4in port, it looks like it will have to be 35in or more to get to around 33hz, i think i have the room to do so as long as the port doesent come to close to the passenger wall. And another thing when i first built the box tuned that low the sub sounded like the cone was hitting the spider a lot, when i go the tuning up a bit it didnt do it unless it was a super low song, im hoping a 4in port will fix these problems and not make them worse...</p></blockquote><p></p>

[QUOTE="brown7348, post: 7809111, member: 641704"] Thanks, you guys are very helpful, and your right, with this 3in port it pushes out a ton of air, almost seems like it would have to be choking the sub its soo much air coming from the port, when i first built the box i guessed a bit on the port length and it was a tad too long i came out tuned to 27.xxx hz with the port 20in long, i cut it down to 16in and it brought me up to 30.xx hz. i know it gained some decibles but not much, im guessing ill have to find out if i have the room to go ahead and add a 4in port, it looks like it will have to be 35in or more to get to around 33hz, i think i have the room to do so as long as the port doesent come to close to the passenger wall. And another thing when i first built the box tuned that low the sub sounded like the cone was hitting the spider a lot, when i go the tuning up a bit it didnt do it unless it was a super low song, im hoping a 4in port will fix these problems and not make them worse... [/QUOTE]

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