Is this speaker ok to use?

greengriff

Member
Messages
176


I don't want to stick it in a cab and put an amp through it at volume until I get an opinion. You can see a part of a thin layer on the surface of the cone has lifted off in one place and is starting to lift off in another.
 

greengriff

Member
Messages
176
Thanks! What would be suitable doping? Also would you peel away the loose material that's not yet torn off? Or stick it back down?
 

pdf64

Member
Messages
7,366
Thanks! What would be suitable doping?
I'd ask at a couple of recone parts suppliers. I think that brushing on a thinned down rubber solution type of glue should do it. What region of the world are you in?
Also would you peel away the loose material that's not yet torn off? Or stick it back down?
That's something of a judgement call really, depending on how thick the loose section is compared to the remaining cone. If the loose bit is thinner, then probably remove it, eg with a scalpel. If it's similar or thicker, then probably best to stick it down.
 

billyguitar

Member
Messages
5,319
I use black automotive RTV gasket stuff in a squeeze tube. It's black and always does a good job, stays flexible. Cheap and available at any auto parts store. I've had the same tube for at least 25 years and it still works great.
 

pdf64

Member
Messages
7,366
PVA is a water based glue, used extensively in building construction to strengthen and stabilise porous materials.
Yeah, its water base and non-hazardous / toxic nature makes it suitable for kids to use.
 

pdf64

Member
Messages
7,366
So maybe it was thinned down with more water?
Yes, to help get the PVA absorbed into the paper. Maybe 1:1 or 2:1 ratio of water to PVA. But it may be best to wait for a speaker builder to chip in @Scumback Speakers @TAWeber
My previous suggestion of a rubber solution type glue may not have been good, as it might set harder over time, rather than remain flexible.
 




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