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4th order question! Driving me crazy!


dudeogo

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So I've seen on a lot of 4th order enclosures the ported section of the box is basically just missing one side and it's almost as if the entire box itself is the port? How does that work with box size, and how do I find tuning for that? Just wondering it's been driving me crazy. Any answers are appreciated!

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It isn't uncommon for people to test their sealed resonance with no loading wall on, and then tuning their port to the discovered frequency.  Is this what you're referring to? 

On 5/8/2011 at 7:38 PM, Kranny said:
On 5/8/2011 at 7:35 PM, 'Maxim' said:

It hurts me inside when I read stuff like this and remember you're 15

LMFAO so true

:blush:

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16 hours ago, hdorre said:

It isn't uncommon for people to test their sealed resonance with no loading wall on, and then tuning their port to the discovered frequency.  Is this what you're referring to? 

No, but thats a good idea. I mean like this where the entire ported box is open. (Hopefully pics work) these are the same subs I'm getting for the same vehicle this box went in.. https://imgur.com/gallery/rL4D5

Stage 3 2008 Mazdaspeed 3

MIDS/HIGHS                                                                               BASS

8 Unlawful Sounds Mark VIIIs                                                  2 15s (in talks with a few companies) 

8 Unlawful Sounds Super Tweeters                                       Soundigital EVO 5000

Amps: Something Brazilian

 

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About the pic you posted, yes the owner made the cross section of his ported volume so that the port area matched it. Find out the port area required for the volume youre using, then play with you HxWxD until your HxW matches your port area

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