Open baffle questions

MadMutt · 31st October 2007, 02:00 AM

With open baffle speakers, do the drivers need any particular specification ?
As in is a speaker with a higher Q better than one with low Q etc.

Is there any formula for baffle size etc.

Or is it all just a matter of trial and error ????

Anything else I need to know.

HiFiNutNut · 31st October 2007, 02:19 AM

Many of your questions have been answered in two wonderful websites. www.linkwitz.com and www.musicanddesign.com. Get the A.B.C. dipole to model your baffle.

MadMutt · 31st October 2007, 03:14 AM

Taaa.
Lots a reading comming up !!

sdclc126 · 31st October 2007, 03:20 AM

Quote:

Originally posted by MadMutt
Taaa.
Lots a reading comming up !!

You'll enjoy it!

fpara · 31st October 2007, 04:07 AM

Primordially, you'd want a high QTS driver

Fast1one · 31st October 2007, 05:40 AM

Quote:

Originally posted by fpara
Primordially, you'd want a high QTS driver

You can also use series resistance to raise the QTS of the system if your speaker has a value lower than ~0.5 (some say higher, depends on who you ask). Of course it will rob you of some efficiency in the process...

holdent · 1st November 2007, 12:10 AM

Martin King has a great design study on OB speakers here: http://www.quarter-wave.com/General/OB_Design.pdf. One of his recommendations "is to use woofer drivers that are at least 6 to 10 dB more efficient than the rest of the speaker system and having Qts values between 1.0 and 1.2". The article is being discussed in the Fullrange forum here:New MJK Baffle Article.

31st October 2007, 02:00 AM	#1
MadMutt diyAudio Member Join Date: Nov 2006	Open baffle questions With open baffle speakers, do the drivers need any particular specification ? As in is a speaker with a higher Q better than one with low Q etc. Is there any formula for baffle size etc. Or is it all just a matter of trial and error ???? Anything else I need to know.

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31st October 2007, 02:19 AM	#2
HiFiNutNut diyAudio Member Join Date: May 2004 Location: Sydney	Many of your questions have been answered in two wonderful websites. www.linkwitz.com and www.musicanddesign.com. Get the A.B.C. dipole to model your baffle.

31st October 2007, 03:14 AM	#3
MadMutt diyAudio Member Join Date: Nov 2006	Taaa. Lots a reading comming up !!

31st October 2007, 04:07 AM	#5
fpara diyAudio Member Join Date: Nov 2005	Primordially, you'd want a high QTS driver

1st November 2007, 12:10 AM	#7
holdent diyAudio Member Join Date: Nov 2005 Location: Ontario	Martin King has a great design study on OB speakers here: http://www.quarter-wave.com/General/OB_Design.pdf. One of his recommendations "is to use woofer drivers that are at least 6 to 10 dB more efficient than the rest of the speaker system and having Qts values between 1.0 and 1.2". The article is being discussed in the Fullrange forum here:New MJK Baffle Article.

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