why ported and why sealed for a given driver? - Page 4 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 4th March 2014, 09:58 PM   #31
diyAudio Moderator
Cal Weldon's Avatar
Join Date: Jan 2004
Location: Near Vancouver
Basalt mineral wool does not pose the same hazard as glass wool. For every article you find that says it is, I'll find you two that says it isn't
Beside, errant fibres are easy to deal with.
planet10 needs your help:
Let's help Ruth and Dave
  Reply With Quote
Old 4th March 2014, 11:48 PM   #32
diyAudio Member
Join Date: Aug 2013
Location: Melbourne
I bet those fine particles could find their way through the spider to the voice coil to..

so does the dampening sort of cancel out the springyness of the Air? I'm talking about a plain sealed box, no filling fluff.
  Reply With Quote
Old 4th March 2014, 11:55 PM   #33
laplace is offline laplace  Australia
diyAudio Member
Join Date: Jan 2014
It's not a matter of cancelling. The force on the cone is the sum of the spring-force due to the box pressure increasing, and the resistive damping force. Adding damping increases the resistive damping force, which lowers Q and makes the system ring less. It does not reduce or cancel out the spring force, it changes the ratio of the two forces.
Open-Source F/Stop Timer
on flickr
  Reply With Quote
Old 5th March 2014, 03:48 AM   #34
diyAudio Member
KaffiMann's Avatar
Join Date: Sep 2009
Location: Grua, Just north of Oslo
Originally Posted by ubza1234 View Post
I bet those fine particles could find their way through the spider to the voice coil to..
I like just having a very thin sheet of felt surrounding the rear of the driver to make sure it's all neat'n'tidy.

I also tried stuffing a t-tqwt with ikea pillows, ended up using a single layer of 2cm thick wool felt in the bottom part, much cleaner sound.
  Reply With Quote


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sealed vs Ported sub?? Kingnoob Subwoofers 48 18th July 2015 07:29 AM
sealed or ported mlr Subwoofers 20 25th March 2012 04:18 AM
SEALED OR PORTED?! carshateme Car Audio 6 11th October 2011 05:28 PM
sealed vs. ported sonu Multi-Way 25 9th May 2005 12:50 PM
Would ported or sealed enclosure be best for this driver in small PA system? The Paulinator Multi-Way 26 25th April 2004 03:38 AM

New To Site? Need Help?

All times are GMT. The time now is 08:54 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2