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Precision Port 4" Flared Speaker Cabinet Port Tube Kit

Brand:|Model: PSP4-BKHT|Part # 268-352
The unique flared-end construction of the Precision Port system enables it to outperform any standard port tube on the market. Conventional tubes suffer from nasty turbulence at the entrance and exit of the port, producing unwanted noise and poor sound quality.
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Part # 268-352
  • Reduces air turbulence to minimize or eliminate port noise
  • Gives your enclosures a sleek, professional look
  • Just cut to length, glue together, and install
  • Mounts in 6-3/16" diameter cutout

Product Details

Precision Port 4" Flared Speaker Cabinet Port Tube Kit

The unique flared-end construction of the Precision Port™ system enables it to outperform any standard port tube on the market. Conventional tubes suffer from nasty turbulence at the entrance and exit of the port, producing unwanted noise and poor sound quality. The Precision Port™ system overcomes these problems and as a result can actually produce a gain of up to 3 dB in output!

Now you can experience good looks, low distortion, and superior overall sound quality thanks to the Precision Port™ system. Convenient front screw holes make this tube easier to install than others on the market. Create a port up to 17" long, then glue with ABS glue found at any hardware store. Installation instructions included. Dimensions: • 7-1/4" outside flare outer diameter • 6-1/4" cutout • 6-3/16" inside flare outer diameter. Also available in 2", 3", and 6" diameters. Proudly made in the USA!

To calculate the proper port length for your cabinet and tuning, use Precision Sound Products' Port Length Calculator.

Precision Port 4" Flared Speaker Cabinet Port Tube Kit
  • BrandPrecision Sound
  • ModelPSP4-BKHT
  • Part Number268-352
  • UPC844632046797
  • Product CategorySpeaker Port Tubes
  • Unit of MeasureEA
  • Product Rating
    (63 Reviews)
  • Weight1.64 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

View similar products to the Precision Port 4" Flared Speaker Cabinet Port Tube Kit
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Precision Port 4" Flared Speaker Cabinet Port Tube Kit
Precision Port 4" Flared Speaker Cabinet Port Tube Kit is rated 4.7302 out of 5 by 63.
Rated 4 out of 5 by from It's okayI feel that for the cost of this tube it should be flush and smooth between the sections of fittings on the inner edges.That isn't so much the case here though. Also, when you mount it to a flat surface, there are still air gaps between the port and the surface for air to escape. Sure it may not make a huge difference in my home audio but in a SPL car setup that would be completely unacceptable along with that nonflush sections. Anyways onto the positive. Easy to assemble. I kept it the full length and didn't cut it so I can't mention on easiness to adjust length. The instructions tell you to use ABS plastic glue. Well I didn't want it to be permanent if I did want to adjust length so I used clear RTA silicone to keep the pieces together since they fit fairly snug by themselves. Also because there was an air gap when it was mounted to the enclosure, I use butyl based sound deadener to make it air tight by packing it on the inside of the enclosure all right next to the flare. Overall it's a good product for those to lazy/ time crunched to make their own port with pvc/heat gun/heat light housings.
Date published: 2015-06-29
Rated 5 out of 5 by from Well made, easy to work withI always buy the precision ports from parts-express. Great product, easy to work with, awesome performance. AND Fantastic Price!!!
Date published: 2015-04-17
Rated 3 out of 5 by from Ok, that it requires 1 inch longer than std not clI am surprised that so many rave about this flared port. Yes, it works, but I give it only 3 stars because (1) the information about the product suggests that it takes less depth of cabinet than a standard port... which is untrue, after you get through the convoluted assembly instructions of cutting the tube "5 inches less than the length required" .... but have to add back 6 inches of flare length on either end, you have a flared port depth that needs to be an inch deeper than a standard port. (2) because it is assembled from parts that butt against each other and held in place with ring that fits over that joint, you cannot adjust and tune it on the fly. Be sure to work your way down from too long carefully. Other ports from PE are much easier to use: just slide inside of one another, press fit is adequate to hold the inside piece in place, and you can adjust it multiple times in or out... and even reuse it in another speaker if you so choose, as I have done many times over the years. I am going to "recommend"... yes it works and does what it is supposed to, but personally would pick another product.
Date published: 2015-02-23
Rated 5 out of 5 by from Ports are a mustNice kit and the ports are properly sized with the outer being the largest. I like how you can use the inner port to draw the cutout size for the outer port. Just wish PE carried a slow 90 elbow, if Precision Sound even makes one.
Date published: 2015-01-25
Rated 5 out of 5 by from Complements my JL 13.5W7AE perfectly!Works as advertised. No port noise, easy to tune, and looks very professional versus a slot port.
Date published: 2014-12-31
Rated 5 out of 5 by from great portsanytime i look to use psp ports i choose parts express there fast and reliable....and the ports are a time saver and easy to install to
Date published: 2014-12-30
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Product Q&A

Get your questions answered from other customers
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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?

Asked by: LargeTarget
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.
Answered by: MattP
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!!

Asked by: hijoe
I have not heard of anyone doing this yet. The main challenges I would see would be the weight and just attaching it.
Answered by: Chrisf
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

Asked by: patton
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.
Answered by: MattP
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 

Asked by: patton
The overall length of this port is 17 inches so that should work for your application
Answered by: Chrisf
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!

Asked by: Life Tech
The diameters published are ID unless otherwise stated.
Answered by: MattP
Date published: 2015-10-12

What is the outside diameter of just the straight port tube section, not the flares

Asked by: Buck3691
The OD of the tube itself is 105.5mm, 4.15".
Answered by: MattP
Date published: 2015-09-04
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