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Precision Port 4" Flared Speaker Cabinet Port Tube Kit
Bought 4" PrecPort 268-352 for Infinity Ref 1262W DVC sub: fs 25hz;qms 6.84:qes .49:qts .46:sd 82.3in2:VAS 80.14L:xmax 13mm.Infinity specs call for 2ft3 box w/4" port of 12 1/4" for fb=30hz.Precision port calc =16.88822in long. Which?Cut center how long?
A 4" diameter 12.25" long port in that volume tunes to about 34 Hz. Precision Ports calculations will get you closer to 30 Hz; I would leave the port the full length and not cut it shorter.
Date published: 2016-01-04
anyone ever tried using this port or another on a bass drum? the adjustable ones would be great in my thoughts. what were your results? thanks!!
I have not heard of anyone doing this yet. The main challenges I would see would be the weight and just attaching it.
Date published: 2016-01-27
what is the cutout diameter or can I slide tube in an assemble inside a 4.25 cutout as box is still under contruction
The cutout of 6-1/4" is just a hair larger than the inside flare diameter of 6-3/16", so it can be assembled outside the enclosure.
Date published: 2015-11-11
I saw on one the q an a I believe you said this would actually be a 12 inch port my plans called for a 16.94 in so I was gonna use the whole thing or is this port too small
The overall length of this port is 17 inches so that should work for your application
Date published: 2015-11-16
Are the Diameter measurements ID or OD for all the speaker tuning ports you carry? Please let me know as soon as possible. Thank You!
The diameters published are ID unless otherwise stated.
Date published: 2015-10-12
What is the outside diameter of just the straight port tube section, not the flares
The OD of the tube itself is 105.5mm, 4.15".
Date published: 2015-09-04