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  #1  
Old 01-03-2009, 04:20 AM
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Default Pvc Ports Vs Aero Ports - Help

Was told that the pvc port with no flare inside will have port noise and sound like crap.

box is for 2 15's with 5 4" pvc ports 17.25" long each 7.6 before sub displacement tuned to 32

Will I have a problem with pvc or should i try to add a flare on the inside of the box?
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Old 01-03-2009, 04:30 AM
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Well since it is tuned to 32 I am guessing its a daily box. If you were doing a straight SPL box then it wouldn't matter but you will want them flared or there will be port noise.
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Old 01-03-2009, 04:32 AM
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alright. thanks for the reply.
guess i will go with a slot port. do not have an extra 60+ right now

Only other option is using the flared end with the pvc pipe but i am not sure if it would fit.
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Old 01-03-2009, 04:39 AM
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Slots FTW, or kerf it if you have a tablesaw
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Old 01-03-2009, 04:57 AM
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Originally Posted by mytyeerinpie View Post
Slots FTW, or kerf it if you have a tablesaw
At school where I will be building. We have a saw stop table saw. look them up they are amazing.

But sub up port back is what I am doing.
And I do not have access to a pool to soak the mdf ( Joke from ca.com)
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Old 01-03-2009, 05:11 AM
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ah yes the ancient pool soaking trick.

I would agree though stick to slot port.
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Old 01-03-2009, 05:18 AM
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ah yes the ancient pool soaking trick.

I would agree though stick to slot port.
LOL yea.

Yea. I am working on it.
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Old 01-03-2009, 08:47 AM
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If you run enough port area a round non-flared port won't make noise but the problem is that people try to get away with using less than the optimal port area to try to keep the enclosure size down. This is why flared ports are so popular, they allow you to get away with sneaking in smaller ports and not pay the port noise penalty.

If you're getting port noise from PVC ports it's because you're not doing it right, not because of the ports.
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Old 01-03-2009, 09:31 AM
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I've done a few boxes with pvc ports and they came out great without any port noise but I also countersunk the port and flared the wood 3/4" to help that lil bit with air flow. It also looked 10x better. Here are some pics.

This box was 10ft net volume with four 6" ports tuned to 32hz. With a pair of Fi Bl 18s powered by a Sundown saz-3000d @ 0.5ohm it hit 151.7db in my Expo. It sounded great on music and really pounded the lows with absolutely zero port noise.





This box was 15ft net volume w/ six 6" ports tuned to 32hz. It was built for my Yukon. With three Fi Bl 18s powered by only a pair of Sundown saz-1500s it hit 148.8s. That setup sucked for #s but it played chopped & screwed music excellently. I swapped in three Fi Btl 18s powered by three Sundown saz-3000s & it burped 152s and easily BassRaced the 149.9 class while still playing any kind of music extremely well without any port noise.











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Old 01-03-2009, 09:36 AM
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^^ that makes it tough
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