How important is spider stiffness?

audiomagnate · 30th March 2013, 04:20 AM

I'm repairing some vintage woofers with brittle/crumbling spiders with new spiders that seem to really firm up the woofer. Am I screwing up the T/S parameters of these old woofs. They still go low but feel stiffer than stock.

dragonweed · 30th March 2013, 04:33 AM

Yes, stiffer spider means less Cms, Vas, and lowers the Qms (therefore Qts) values. Also raises Fs of course.

norman bates · 30th March 2013, 04:41 AM

stiffer spider may make it less detailed in the high end because the driver is fighting harder to move.

JMFahey · 30th March 2013, 04:50 AM

Quote:

Am I screwing up the T/S parameters of these old woofs.

Don't think so, simply because you are getting them back to "as new" spec.

Quote:

brittle/crumbling spiders

is definitely what original Speaker Designers did NOT have in mind.

chris661 · 30th March 2013, 02:54 PM

Quote:

Originally Posted by dragonweed

Yes, stiffer spider means less Cms, Vas, and lowers the Qms (therefore Qts) values. Also raises Fs of course.

On most drivers, Qts will barely change, as its dominated by Qes.

30th March 2013, 04:20 AM	#1
audiomagnate diyAudio Member Join Date: Feb 2011 Location: Colorado, USA	How important is spider stiffness? I'm repairing some vintage woofers with brittle/crumbling spiders with new spiders that seem to really firm up the woofer. Am I screwing up the T/S parameters of these old woofs. They still go low but feel stiffer than stock.

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30th March 2013, 04:33 AM	#2
dragonweed diyAudio Member Join Date: Sep 2010 Location: Hungary	Yes, stiffer spider means less Cms, Vas, and lowers the Qms (therefore Qts) values. Also raises Fs of course.

30th March 2013, 04:41 AM	#3
norman bates diyAudio Member Join Date: Nov 2003 Location: iowa	stiffer spider may make it less detailed in the high end because the driver is fighting harder to move.