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Precision Port 3" Flared Speaker Cabinet Port Tube Kit
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
Need two 3" Dia by 11" long ports are thes kits long enough ? Also do I account total length of the flared inputs that will be on each end ? Thanks
Yes these will be long enough. In order to end up with an 11" useable length, you will want to cut the tube portion of this port to 9-1/2".
Date published: 2014-04-08
port on bottom of cabinet facing the ground?
the floorstanding DIY cabinet im trying to port needs a 12.75 inch long port that is 3 inches in diameter. this fits the bill nicely, but the cabinet is only 9 by 9, so i cant do that without an elbow which would raise the cost by a lot. it is 40 inches tall, so i figured i could put the port on the bottom facing the floor. is that ok? any suggestions?
There is no problem with this as long as there is 3" of clearance or more on the bottom of the cabinet.
Date published: 2014-02-06
13.5" length port in a 14"x14"x14" cabinet?
it will end up being like 1/2 an inch away from the wall of the cabinet. is this okay?
No. The general rule here is you dont want the port to end within a distance to a side less than the port's diameter. That would mean keeping it 3" from a wall or side with this port.
Date published: 2013-03-18