low loss suspension? relation with stiffness of the suspension? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

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 11th July 2013, 06:43 PM   #1
diyAudio Member
Join Date: Aug 2012
Default low loss suspension? relation with stiffness of the suspension?

what is the relation between the

Qms and Cms and low loss suspension?

low loss suspension will be loose or tight?

High Qms means stiff suspension or loose suspension?
  Reply With Quote
Old 11th July 2013, 09:42 PM   #2
gedlee is offline gedlee  United States
diyAudio Member
gedlee's Avatar
Join Date: Dec 2004
Location: Novi, Michigan
The two things are generally unrelated, except that Qms does depend on fs, which depends on Cms, but Cms and Rms are independent.
Earl Geddes Gedlee Website
  Reply With Quote
Old 12th July 2013, 02:30 AM   #3
diyAudio Member
Join Date: Aug 2012
generally what is low loss suspension means does it means loosely suspended cone or tightly suspended cone?
  Reply With Quote
Old 13th July 2013, 05:14 PM   #4
diyAudio Member
Greebster's Avatar
Join Date: Aug 2010
Location: South of the Skyway
Neither, means it minimally dampens.
  Reply With Quote
Old 13th July 2013, 06:29 PM   #5
diyAudio Member
Richard Ellis's Avatar
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Let's see if I've got this right & I will attempt to answer, right or wrong...the question posed. Of the two types suspension we are all familiar with let me pose the notion of a "low loss" type(Which is backwards in my understanding).
The term low loss infers a type of suspension whereby 'little' is lost...little what? When a cone is set in motion "little is lost" from the vibrations of the cone, thru the suspension, attempting to set in motion, or pass said vibration into the frame or basket of any one driver. An example of that we have seen is the ultra-cheap type driver where the cone material itself is simply folded or pleated to create the surround, or the outer suspension of the cone. Being as the vibrations initiate from the voice-coil, vibrations radiate outward along the cone material itself, thru the folded SAME material into the Basket. This would imply there is little lost transfering vibrational energy.....Low-loss.
At the seeming other end of the scale we have another cone with the common surround, the half circle of a type of foam material...If I recall correctly the name of Norosorex....a type of substance that absorbs & dissipates vibrational energy thereby not passing any vibrational energy components.........this would be called the High-loss type.
Note we haven't even got into linear motion of the two very different types & their properties, advantages & dis-advantages.

__________________________________________________ ____Rick........
  Reply With Quote
Old 14th July 2013, 09:34 PM   #6
4Torr is offline 4Torr  United States
diyAudio Member
Join Date: Sep 2012
Location: Southern California
Originally Posted by rhythmsandy View Post
what is the relation between the

Qms and Cms and low loss suspension?

low loss suspension will be loose or tight?

High Qms means stiff suspension or loose suspension?
High Qms means that the spider and cone surround have more "spring" and less friction than a low Qms driver. Like the other Thiele/Small parameters, it affects the volume and fb tuning of the speaker enclosure to obtain a desired response. In and of itself, it's not a good or bad thing.
  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
stiff suspension or loose suspension for the home subwoofers? rhythmsandy Subwoofers 67 21st October 2013 05:27 PM
A hole in the suspension ziocalepino Full Range 19 4th March 2011 10:22 PM
what suspension? davecooper Analogue Source 12 13th October 2010 09:59 PM
Restoring old suspension rjb Multi-Way 1 23rd June 2008 03:54 AM
Suspension collapsed davidsrsb Analogue Source 4 26th January 2006 07:06 PM

New To Site? Need Help?

All times are GMT. The time now is 10:42 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