Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Vent length in subwoofer simulator
Vent length in subwoofer simulator
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 27th October 2005, 04:30 PM   #1
bobo1on1 is offline bobo1on1  Netherlands
diyAudio Member
 
Join Date: Dec 2003
Location: Tulips, windmills and wooden shoes.
Default Vent length in subwoofer simulator

Hi,


I simulated an 8th order bandpass enclosure in subwoofer simulator.

I want to use round vents that are 6 cm in diameter, according to my math that is:

6 * 6 * 1/4 * pi = 28,27 cm²

28,27 * 0,15500031 = 4,38 square inch

However when I enter this in subwoofer simulator the huge vent length it calculates can't be correct can it?

Click the image to open in full size.


I get the same results when I simulate a vented enclosure and compare it to winisd.

Can anyone help? I'm sure I'm doing something wrong.
  Reply With Quote
Old 27th October 2005, 05:04 PM   #2
Notax is offline Notax  Montenegro
diyAudio Member
 
Notax's Avatar
 
Join Date: Jun 2004
Location: Belgrade
Because, you must put half-diametar (Rv) at Av. In program, it is written Av, but its calculate with Rv (diametar/2).
In this case, Rv is 30 mm or 1.181 inch.
I sugest to work with 2 or 3 tubes with that diametar, for every volume. In the case of 3 tubes, its sqr(3)*Rv=1.732*1.181(inch)=2.046 inch (half-diametar 52 mm)
  Reply With Quote
Old 28th October 2005, 03:20 PM   #3
bobo1on1 is offline bobo1on1  Netherlands
diyAudio Member
 
Join Date: Dec 2003
Location: Tulips, windmills and wooden shoes.
Thanks, that worked

Now this image just to check that my understanding of the 8 th order bandpass is correct:

Click the image to open in full size.
  Reply With Quote
Old 28th October 2005, 04:11 PM   #4
Notax is offline Notax  Montenegro
diyAudio Member
 
Notax's Avatar
 
Join Date: Jun 2004
Location: Belgrade
I don"t know is that correct, but I wouldn"t do that. It seems to complicated. Simulation are not exact what you got in real, specialy for something like this. Good luck.
  Reply With Quote

Reply


Vent length in subwoofer simulatorHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Vent length question DAMIC Multi-Way 4 20th September 2006 05:53 AM
Vent length recalculation formula arjscott Multi-Way 3 29th May 2006 11:54 AM
Vent Length eag Subwoofers 3 26th February 2006 01:31 AM
new Subwoofer Simulator f4ier Subwoofers 4 7th May 2002 06:09 PM


New To Site? Need Help?

All times are GMT. The time now is 01:27 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki