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mark214
12-23-2021, 12:29 AM
Was there someone doing 066 aftermarket repairs at one time? Glued a dome over a dented dome?
Odd looking.

90028
Robh3606
12-23-2021, 12:06 PM
That's a Ti dome.

Rob:)
mark214
12-23-2021, 04:11 PM
Is that a JBL factory dome?
I know I love my JBL's but I am not as well versed with JBL as many here which is why this site is a great resource.
The photo below are the only 066s I have ever seen.
https://external-content.duckduckgo.com/iu/?u=http%3A%2F%2Fwww.audioheritage.org%2Fvbulletin% 2Fattachment.php%3Fattachmentid%3D81671%26d%3D1530 991126&f=1&nofb=1
Robh3606
12-23-2021, 04:57 PM
No the original was phenolic with a vacuum deposited aluminum coating. There was never a JBL option for a Ti diaphragm. That is an aftermarket or DIY replacement/modification.

Rob:)
mark214
12-23-2021, 05:16 PM
No the original was phenolic with a vacuum deposited aluminum coating. There was never a JBL option for a Ti diaphragm. That is an aftermarket or DIY replacement/modification.

Rob:)

When JBL announced the deposition process I talked to a JBL retail rep and they were very proud of the process.
Given the amount dented domes out there aftermarket replacements might sell a few units.

Thank You for answering my question
BMWCCA
12-23-2021, 09:18 PM
No the original was phenolic with a vacuum deposited aluminum coating. Actually, I believe JBL referred to it as a "vapor deposition process" which many here have likened to spray painting. :dont-know:
Robh3606
12-23-2021, 11:24 PM
Actually, I believe JBL referred to it as a "vapor deposition process" which many here have likened to spray painting. :dont-know:


You know I heard that as well where they were just using a spray can. Originally this is how they say it was done. Sputtering is done under vacuum we use it all the time at work. That's why I called it vacuum deposition.

Look here:

http://www.lansingheritage.org/images/jbl/specs/home-speakers/1976-l166/page2.jpg

Rob :)
BMWCCA
12-24-2021, 06:20 AM
You know I heard that as well where they were just using a spray can. Originally this is how they say it was done. Sputtering is done under vacuum we use it all the time at work. That's why I called it vacuum deposition.Can I send you a few 044s for a refresh?
:sleigh:
Robh3606
12-24-2021, 07:01 AM
Can I send you a few 044s for a refresh?
:sleigh:

Lol unfortunately no! I would be shot on sight putting it into one of the machines. It's all cleanroom and you have to go through a rather elaborate cleaning regiment before you can put anything into one. Back to the paint can!

Rob:) :xmas:
speakerdave
12-24-2021, 10:38 AM
As I recall Giskard recounting the 066 dome story, the aluminum was sputtered until the machine broke; then they resorted to spraying. :p
BMWCCA
12-24-2021, 11:04 AM
When I get around to it, I think I'll try an air-brush.
Robh3606
12-24-2021, 02:38 PM
When I get around to it, I think I'll try an air-brush.

That's a really good idea.

Rob :)