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

Multi-Way Conventional loudspeakers with crossovers

Mechanical (excursion limited) power handling of a woofer in free air or open baffle
Mechanical (excursion limited) power handling of a woofer in free air or open baffle
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 9th November 2019, 06:12 AM   #1
sujat is offline sujat  India
diyAudio Member
 
Join Date: Nov 2019
Location: Bhaarat (India)
Smile Mechanical (excursion limited) power handling of a woofer in free air or open baffle

Dear Veterans & Fellow Enthusiasts!

I have gained valuable clarification, refinement and augmentation in my amateurish understanding of loudspeaker design through your insights and experience shared here.

I still have a basic question due to my being quite a lay person in this field. Unfortunately, even extensive searching for this answer over the internet has failed me, hence i take resort to this forum.

I do understand that irrespective of the quoted thermal power handling of a driver, its mechanical (excursion limited) power handling becomes relevant/dominant when used in applications like open baffle as well as sealed enclosures where Vb is much > Vas.

Q.1: For a usual entry level 8" mid-bass driver (eg: Goldwood or GRS driver as sold by Parts-Express; where Fs=60 hz; Qts=0.9; Cms=0.4; Xmax=3 mm, Vas=25 litres), what can i take its "mechanical power handling" to be in free air (or open baffle) when fed with a signal at its Fs? I am looking toward a modest open baffle application.

Is there a formula or equation that can give such value for any mid-bass driver?

Q.2: Would this mechanical power handling be higher in an open baffle considering it is fed with music which is non-synthesised (i.e. only acoustic instruments used as in heavy orchestral and folk)? - [Note: i will be driving it direct and full-range.... without any crossover component, with only a high-pass for a tweeter.]

Q.3: Given the same driver above, how much increase in its mechanical power handling can i estimate if as an alternative, i mate it with a sealed enclosure (in an extreme case) with Vb 150 litres (i.e. Vas * 6)? Is there an equation that gives such a figure for a given Vb as relative to driver Cms-Qts & Vas, so that it may enable me to calculate MECHANICAL power handling of a woofer for a range of sealed enclosure sizes?

Could you please shed some light on this? It would greatly help me gain clarity into this issue. I eagerly look forward to your insight and guidance!

Thanks and regards!
Sujat
  Reply With Quote
Old 9th November 2019, 08:39 AM   #2
fatmarley is offline fatmarley  England
diyAudio Member
 
Join Date: Aug 2003
Location: Cheltenham
The very best way to find out is to model the driver in software.
  Reply With Quote
Old 9th November 2019, 09:24 AM   #3
sujat is offline sujat  India
diyAudio Member
 
Join Date: Nov 2019
Location: Bhaarat (India)
Quote:
Originally Posted by fatmarley View Post
The very best way to find out is to model the driver in software.
Thanks fatmarley, i was really hoping there must be some guideline or indicative 'rule-of-thumb' that could be taken as a base though.

I agree with u.. what i am seeking may not be the best way, but probably a workable way that can be taken as a guideline.

Last edited by sujat; 9th November 2019 at 09:28 AM.
  Reply With Quote

Reply


Mechanical (excursion limited) power handling of a woofer in free air or open baffleHide 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
Modeling cone excursion in an open baffle owdi Multi-Way 9 9th November 2019 05:41 PM
Eminence High Excursion 8" Factory open baffle sub replacement? (Mobile Audio) Jeremy067390 Subwoofers 14 9th March 2017 02:30 PM
WS20E4 max excursion in a open baffle design silverprout Multi-Way 16 29th April 2016 08:17 AM
Midrange power handling + baffle step question phreeky82 Multi-Way 9 15th July 2014 09:20 PM
open baffle / free air Kal Multi-Way 5 13th April 2004 08:29 PM


New To Site? Need Help?

All times are GMT. The time now is 11:12 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki