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Port Tube

3" diameter, 4-1/2" long

6 Reviews

Item # 125M1702

In Stock

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Our take on the Port Tube

Building your own subwoofer enclosure? This port tube features a rolled flange to ensure a clean fit on the outside of your box. The tough ABS plastic tube features markings that make it easy for you to trim the tube to the proper length for your driver and box combination.

Product Highlights:

  • ABS plastic port tube for subwoofer box construction
  • rolled front flange for secure mounting
  • internal diameter: 3", external diameter: 3-1/4"
  • depth: 4-1/2"
  • warranty: 60 days
  • Our 60-day money-back guarantee

They work great, no issues. Fantastic price!

Ken, Olympia, WA

What's in the Box:

  • One 3" Dia x 4.5" flanged port tube

Port Tube Reviews

Average Customer Review(s):

(6 Reviews)

Port Tube / Trunk Vent

Robert from Elk Grove, CA on 10/1/2017

Crutchfield Customer Review (What's this?)

I used 2 of these Port Tubes in the rear deck of my car to help the trunk breathe a little due to 2 pioneer sub. I have recently purchased 2 Alpine Type R subs from Crutchfield and I'm hoping the installation of the Port Tubes will continue to help. At this time with the Pioneer subs I have noticed a very smooth roll off with less vibration and rattles. I also did some sound dampening at the same time. I would recommend the Port Tubes for any installation.

Pros: Awesome

Cons: None

Standard port

Jon from Tyrone, PA on 5/17/2016

Crutchfield Customer Review (What's this?)

Standard port. Does what you expect. A little noise But if your box is in your trunk you never hear it. Adding a port to a box definitely increases bass output from almost any box. Crutchfield should offer a better selection of ports. Longer ports are often needed with a smaller box. Flared ports eliminate port noise. Neither of these are offered.

Pros: Flanged too easy to install

Cons: Very small amount of port noise.

Nice ports

Ken from Olympia, WA on 4/11/2016

Crutchfield Customer Review (What's this?)

They work great, no issues. Fantastic price!

Pros: Fit nice, price

Cons: N/A

Perfect Product

Dapesa from Boulder Co on 3/13/2015

Crutchfield Customer Review (What's this?)

Perfect product, excellent quality



Port Tube

felipe from los angeles on 9/5/2014

Crutchfield Customer Review (What's this?)

amazing port, really improves sound quality and spl.

Pros: great material used for the port and very easy to use


Port tube

Ferdie from Chatham , nj on 1/1/2014

Crutchfield Customer Review (What's this?)

It's a perfect fit on the subwoofer box that I am building. I don't need to cut the length it's just fine.

Pros: Nice material

Cons: None


Hands-on research

Product Research


Overview: This is a plastic port tube used for ported enclosures for subwoofers.


  • Cutout Diameter: 3.243"
  • Interior Diameter: 3.004"
  • Outer Flange Diameter: 3.894"
  • Length: 4.5"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

for speakers to properly work. [ JOHN  Dec 18, 2016 ]
I listen to heavy metal and rap. As with most people that enjoy these genres, ported boxes sound much better [ Jon  May 04, 2016 ]