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Precision Port 3" Flared Speaker Cabinet Port Tube Kit
What is the outside diameter of the plastic tube portion on this? The actual tube itself, not the flares or connecting sleeves. Currently my internal bracing has 3.25" diameter holes. Thank you.
The OD of the tube itself is 3-1/8".
Date published: 2014-09-18
I'm using this 3" port to replace the 3" diam. cardboard tube on JBL L-88's. I was going to use the same length, including the flares, as the original cardboard tube. Bad idea? I can only shorten the tube not lengthen it because of space limitations.
If you make the overall flared port the same length as the original straight port the tuning will go up slightly, but only a few Hz. This should not negatively affect audible performance.
Date published: 2014-09-09
Does this kit come with at least a foot of port length? I need at least 11 inches of port...
The main tube of this kit is 12" long total, with flares added the overall length is 18".
Date published: 2014-09-08
I'm working on a ~1 cu ft box for a 10" sub, and want it to be tuned to 32 hz. That requires a 3" port with length of 15.3". If I went with 2 3" ports, would they both need to be 15.3" long?
If you wanted to add a second port, they would each need to be 34" long to achieve the same tuning frequency.
Date published: 2014-06-12
How big does the hole in the cabinet need to be? The holes I have are about 3 1/4" and not much room to make larger. I guess I'm asking what is the dimensions of the very end of the tube and the dimension of the flare at the end where it screws in
The cutout for this port is 5-1/4 and the overall outside diameter is 6-1/4
Date published: 2014-06-06
I'm rebuilding a damaged polk audio sub box. It has a 3"Dia flared port that I won't be able to salvage and need to duplicate for the new box. It has an elbow in the port, how do I measure the elbow to ensure I accurately replace with a precision port?
You want to measure from the center of the elbow, as close as possible at least. This will give you the working length of the port.
Date published: 2014-04-22