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Precision Port 2" Flared Speaker Cabinet Port Tube Kit
Port length is too long, how can I do this? (half an inch longer :/)
Hello,I am building ZX Spectrum DIY Build by Paul Carmody and his design states a 2" diameter port 3.5" long. So I ordered the Pecision 2" port kit and I am reading the instructions and it gives a formula to calculate the tube port lenght (Lv) and than it states that the center tube should be trimmed 4" shorter than Lv.... my Lv is 3.5"... soo yeah problem. Without the center tube the flared ports I guess are .5" longer than I need them. So my dilemma is, can i shave off/cut .25" from each flare end and than join them with the ring (which i will also have to adjust)? Will this behave as a 3.5" port?The instructions also state that the fully assembled port should be 1" longer than Lv which would make mine 4.5"
kinda hard to follow your question but the length of the flare's aren't included in the tuned port length. only the part of the port that is 2" on the ID counts an the length. i hope that helps.
Date published: 2012-02-13
i'm building my first 2 way with your guidance. I cannot fit the port tube on the front. does it matter where on the cabinet that this is placed. Also, is there a standard as to where the woofer and tweeter get placed? should there be a specific space between them or as close together as possible.thanx
It depends on the placement of the speaker in the room, as well as the tuning of the port. It is fine to have the port in the back if the speaker will not be directly up against the wall. It would be a good idea to have it at LEAST 4-5" away from the wall, more is better. Placing the port on the front will produce some unwanted distortion in your signal. You will get a "gulping" noise that will be partially masked by placing it on the rear of the cabinet. In my experience I would say that it is better to have the port on the back side of the cabinet. The lower frequencies are essentially omnidirectional, so the fact that they are not firing at the listener is okay. As for driver placement, it is good to try and mimic a point source for the sound. This means putting the drivers closer together is better.
Date published: 2012-01-19
There are no details on adjust-ability of this product. Can it be cut to correct length, then have the ends attached??
Yes. You can cut the tube to whatever length you want, then attach those to the flared ends. The kit consists of two flared ends, 1 tube and two connectors to connect them all together.
Date published: 2011-11-08
Will this be a proper sized port for a single 6 1/2 subwoofer?
Couldn't tell ya :-) The port's size is used to tune the enclosure based on the enclosure's volume not the speaker. The size of the enclosure is determined by the speaker.
Date published: 2013-05-01
How short in length can this port be adjusted to?
The shortest this port could be cut to is roughly 3" which is essentially just attaching the two flares together.
Date published: 2013-06-07