Car Stereo is the #1 Car Audio Online Resource for radio,speakers, MP3, amps, subwoofers, box enclosures, IASCA,DB Drag Racing, USACi and MECA events Car Stereo is the #1 Car Audio Online Resource
Car Stereo is the #1 Car Audio Online Resource
Car Stereo is the #1 Car Audio Online Resource Welcome to CarStereo.com the Internet Guide to Car Audio Car Stereo is the #1 Car Audio Online ResourceMY ACCOUNT   
Car Stereo is the #1 Car Audio Online Resource
Box Design Box Design
Amplifiers Amplifiers
Basic Electrical Basic Electrical
Car Audio Basics Car Audio Basics
Crossovers & Filter Calculator Crossovers & Filter Calculator
Equalizers Equalizers
Installation and Wiring Installation and Wiring
Source Unit Source Unit
Speaker Speaker
#CategoryName# Car Audio Terms
#CategoryName# Sub Box Design Software





SonicElectronix.com - 1-877-BUY-SONIC
Up to $30.00 in FREE custom install kits on select car stereos. Largest selection online, great prices, Daily Deals and FREE shipping on most products. We are an authorized dealer for Infinity, JBL, JVC, Kicker, MTX, Vibe, RE Audio and others.
Car Audio Black Friday Sales!
Share |


 

Port Types for Speaker Boxes and Subwoofers

This page contains descriptions of the variations in port designs used in speaker enclosures.

 The most common type of port is a round tube. These are typically made of black plastic and look like a section of thin-walled pipe with a lip on one end.

Round Style Ported Speaker Enclosure

 The second most frequently used type of vent is a square port. The advantage of this design is that you are not limited by availability of only certain diameter tubes. You can also build the port out of the same material you are using to fabricate the enclosure.

Square Style Ported Speaker Enclosure

 The last type of vent is called a slot port. It is created using one wall of the enclosure as a wall of the vent. This can be very useful for bandpass enclosures which can be very hard to tune to a low enough frequency due to the small size of the front (vented) chamber. Friction created by the air flow in the enclosure traveling along the enclosure wall makes this type of port effectively longer than it physically is - which tunes the enclosure to a lower frequency so a slot port will be shorter for the equivalent vent area when compared to a simpler square vent.

Slot Style Ported Speaker Enclosure

Porting tips:

Keep the port(s) as far away from the enclosure sides and back as possible except for the slot type port.

Make sure the inside end of a tube or square port is at least the equivalent of one vent diameter away from the back of the box or any bracing materials.

Keep the vent free from anything that may affect air flow through it.

The port should also be placed as far away from the speaker cone as practical.



 

 previous page Back Email this page to a Friend 
Home  |  Contact Us  |  About Us  |  Advertise  |  Car Audio How to Links  |  Join!  |  Log-In
 
Copyright © 2006 Online ConneXions Inc.
Web Designed & Hosting