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Old 27th March 2003, 11:34 PM   #1
G is offline G  United States
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Default Any opinions on this product?

Has anyone used the port tube in the link below? Where you satisfied with the performance?

G

http://www.partsexpress.com/pe/showd...D=117897&DID=7
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Old 28th March 2003, 01:59 AM   #2
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I did not use this port specifically but I have used similar one. Sometime this is the only way to remove port noise (especially for a sub).
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Old 28th March 2003, 02:43 AM   #3
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Default Re: Any opinions on this product?

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Originally posted by G
Has anyone used the port tube in the link below? Where you satisfied with the performance?
The concensis is coming around to the idea that flared ports are always a good idea. I never bother with the store-bought ones, preferring a stout piece of PVC and a round-over router bit.

dave
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Old 28th March 2003, 02:58 AM   #4
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Hmm... Give me a wood-turning lathe and I could cast a bunch of those out of aluminum!

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Old 28th March 2003, 12:21 PM   #5
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Default Re: Re: Any opinions on this product?

Quote:
Originally posted by planet10


The concensis is coming around to the idea that flared ports are always a good idea. I never bother with the store-bought ones, preferring a stout piece of PVC and a round-over router bit.

dave

That's a cheaper approach. The results are between the strait one and the flared one I think.
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Old 28th March 2003, 06:01 PM   #6
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Default Re: Re: Re: Any opinions on this product?

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Originally posted by François
That's a cheaper approach. The results are between the strait one and the flared one I think.
Properly terminated on the inside and with a large enuff roundover, they are at least as good.

dave
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Old 28th March 2003, 11:18 PM   #7
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Ok, I believe the master
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Old 29th March 2003, 01:21 AM   #8
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Default port construction

The main thing a port tube designer can aspire to is to reduce port noise. There are two sources of that. 1) Sound in the cab shaking the tube, and 2) Wind noise of the waves moving in and out of the port entrance and exit. Of these 2 is easy to fix by using a hefty tube. If you are nuts you could wrap the outside of it in a damper.

The wind noise however is real, and difficult to stop - thus the flared ends. Now, the most hi-tech tubes out there are the tubes used for small diameter hvac terminators. pvc. If you want to something interesting take a look at these tubes. Because they go into architecture its a million dollar engineering job designed to reduce wind noise at a tube termination.

My old subwoofer diy group had some people who tried it and it worked.
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