front or rear port

blu_line · 12th March 2004, 07:05 AM

I am designing and building my new WMT speakers with VIFA drivers. The Woofer needs a vented box.
What is the difference and what things i need to consider to use a front OR rear vent/port ?

Simon

gary f · 12th March 2004, 02:08 PM

Why not try the down firing port. I am building a design with this type of port and maybe next week, i will finaly know if it is as good as i think...
F

Reflex port under the cabinet ??

moving_electron · 12th March 2004, 02:19 PM

The concensus seems to be that:

1) The bass response is the same in either case.

2) the frequencies out of the port are low enough they do not cause issues of interacting with the output of the woofer.

3) there are effects from the port acting like a pipe and when rear facing this effect is difussed so is not an issue.

4) Many have used front ports without running into practical effects of this pipe issue

5) rear port means the speaker cannot be flush against the wall. Others say why would you do that anyway.

Timn8ter · 12th March 2004, 02:20 PM

Nice summary!

12th March 2004, 07:05 AM	#1
blu_line diyAudio Member Join Date: Jan 2002 Location: The Netherlands	front or rear port I am designing and building my new WMT speakers with VIFA drivers. The Woofer needs a vented box. What is the difference and what things i need to consider to use a front OR rear vent/port ? Simon

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12th March 2004, 02:08 PM	#2
gary f diyAudio Member Join Date: Aug 2003 Location: Quebec city	Why not try the down firing port. I am building a design with this type of port and maybe next week, i will finaly know if it is as good as i think... F Reflex port under the cabinet ??

12th March 2004, 02:19 PM	#3
moving_electron diyAudio Member Join Date: Jan 2004 Location: Where the rain does fall but the trees grow tall	The concensus seems to be that: 1) The bass response is the same in either case. 2) the frequencies out of the port are low enough they do not cause issues of interacting with the output of the woofer. 3) there are effects from the port acting like a pipe and when rear facing this effect is difussed so is not an issue. 4) Many have used front ports without running into practical effects of this pipe issue 5) rear port means the speaker cannot be flush against the wall. Others say why would you do that anyway.

12th March 2004, 02:20 PM	#4
Timn8ter diyAudio Member Join Date: Jul 2003 Location: Seattle, WA	Nice summary!

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