Question about H/W/U-frame resonance

454Casull · 9th February 2005, 11:17 PM

Regarding the resonance which occurs at a frequency whose wavelength is 1/4 of the length of the frame opening: is the resonance audible AT ALL if the response peak is equalized flat? i.e. would sound at that frequency decay much more slowly than other parts of the passband of the dipole woofer?

454Casull · 10th February 2005, 12:55 AM

Too late to edit the post, so change "audible" to "measurable/audible".

454Casull · 10th February 2005, 11:50 PM

Anybody?

taloyd · 11th February 2005, 12:18 AM

hello,

try posting this question on the Madisound Audio Discussion forum:

http://madisound.com/cgi-bin/discuss.cgi

I'm sure JohnK and several others will jump on a chance to answer you...

cheers,

-tal

ps: (w-frame has the least usable range... H-frame has the most. So if you're looking to get midrange out of it, then there's no way a W-frame will work...)

rick57 · 13th February 2005, 08:51 AM

454
If the resonance is in your desired passband, you will be able to notch filter it satisfactorily *if components are available of the right value for the ‘centre’ and width of the resonance.
A friend tried to filter some very sharp driver resonances but the right value components were not availble. However if you look at eg the resonance of SL’s W baffle on his site, it’s very broad, and probably doable.
What passband were you after?

9th February 2005, 11:17 PM	#1
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	Question about H/W/U-frame resonance Regarding the resonance which occurs at a frequency whose wavelength is 1/4 of the length of the frame opening: is the resonance audible AT ALL if the response peak is equalized flat? i.e. would sound at that frequency decay much more slowly than other parts of the passband of the dipole woofer?

11th February 2005, 12:18 AM	#4
taloyd diyAudio Member Join Date: Apr 2004 Location: Los Angeles, CA, USA	MAD hello, try posting this question on the Madisound Audio Discussion forum: http://madisound.com/cgi-bin/discuss.cgi I'm sure JohnK and several others will jump on a chance to answer you... cheers, -tal ps: (w-frame has the least usable range... H-frame has the most. So if you're looking to get midrange out of it, then there's no way a W-frame will work...)

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10th February 2005, 12:55 AM	#2
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	Too late to edit the post, so change "audible" to "measurable/audible".

10th February 2005, 11:50 PM	#3
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	Anybody?

13th February 2005, 08:51 AM	#5
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	454 If the resonance is in your desired passband, you will be able to notch filter it satisfactorily *if components are available of the right value for the ‘centre’ and width of the resonance. A friend tried to filter some very sharp driver resonances but the right value components were not availble. However if you look at eg the resonance of SL’s W baffle on his site, it’s very broad, and probably doable. What passband were you after?

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