Coated woofer - why?
An old (20+ years) speaker with multiple previous owners has a coated woofer - why would this mod be made? What are the implications for SQ? Speaker is a LS35A type with original KEF B110 woofer. Let me add, that if you are in need of direct replacements, the company Falcon Acoustics, sells all replacement parts. https://www.falconacoustics.co.uk/bbc-ls3-5a/falcon-ls3-5a-b110-drive-units.html It couldn’t hurt to think about replacing those old woofers. Surrounds, glue, etc tends to age. |
Thanks guys, glad to have learned a bit today. Wish I could have seen the post that was deleted, I am sure I missed out on a nasty clever bit of advice, hopefully it was a pun. I was expecting a “cuz its cold” but ebm must have been much better. Anyway, simonmoon, this was certainly a mod as other speakers of the same brand/type do not have this look, a glossy blackish kinda coating, and the owner mentions the coating. |
JBL did this back in the 70’s or maybe earlier with a coating called Aquaplas which I believe was like a silica based epoxy spray. Supposed to improve damping, making paper cones more rigid and probably, and historically proven to extend the cones life without the inherent dry rotting of old paper cones. I’ve got a pair of WX 4311s from the 70’s and the original woofer cones are still very firm and rigid. Also the treated accordion cloth surrounds were way ahead of their time. |
Btw this was the way Sonus Faber did the same FS (resonant frequency) lowering and stiffening of their bass cones on their stuningly magical sounding Extremas. https://images.app.goo.gl/w9frGfkLN9dfrJoJ6 Cheers George |
