|15th December 2005, 07:35 AM||#31|
Join Date: Aug 2003
Location: Santa Cruz, California
|15th December 2005, 08:10 AM||#32|
Join Date: May 2002
I assume that most "airtight" boxes are leaky enough that pressure changes aren't a problem.
But I just had an idea how one could make a really tiny hole of exact diameter:
1.) Drill a suitable hole into the cabinet (preferably at a hidden place).
2.) Glue a piece of insulated wire into the hole and make sure that everything is airtight.
3. Pull the conductor out of the wire and clip bot ends of the remaining tube close to the cabinet walls.
If you want to get a tube that is longer than the wall thickness then you could simply leave the inner part of the wire longer.
|15th December 2005, 09:18 PM||#33|
Join Date: Jul 2004
Location: Mountain View, CA
"While the hole will relieve the spring effect... the driver will not see it."
Yes and no. The driver will not see it at operating freq. It will see it statically.
This says it very well:
"The idea is to create a hole that's resistive enough that the pressure differentials during operation inside the enclosure won't create any serious air movement through the hole, but air can very slowly pass through it to do the pressure equalization thing."
"But I just had an idea how one could make a really tiny hole of exact diameter:"
There is no reason whatsoever to make an exact diameter.
The felt over a hole idea was good.
Tiny holes can be surprisingly noisy. I had a ticking noise coming from around a hole with a tight woodscrew in it.
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