Evening All,
I have just purchased 2 "nice" subwoofer drivers (Jaycar CW-2145) which have their cone materials made of woven carbon, similar I guess to the Kevlar cones of B&W, but not as dear and probably not as good.
BUT, the weave leaves little gaps between the fibres which, on testing with a soft suction cup, appear to leak air.
Reading my "Bullock on Boxes" it would appear that this is a highly undesirable feature and that I should consider sealing the weave. "Back then", he used rubber solution for that purpose.
I have checked with Jaycar themselves and they are unable to provide any information about this, and they do not see it as a problem because they have been selling the driver for 10 years. Sometimes the dust caps pop off and they are repaired with a PVA glue (similar or the same as what I know as Aquadhere). This is the same glue they use for their new "rubber surround" re-rolling kit.
Any thoughts:
1) Ignore it.
2) Quantitate it as a Q box loss.
3) Seal it with ... what: rubber solution, PVA, ?diluted silicone gap ssealer??
All ideas seriously and gratefully cogitated upon.
Regards,
Mark Walsh.
PS I asked the Jaycar dealer whether he has noticed the driver "badged" differently by other distributors. He has not come across this despite looking.
Here are the details:
http://www1.jaycar.com.au/productView.asp?ID=CW2145&CATID=15&keywords=&SPECIAL=&form=CAT&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=383