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Please, let us know if you replace them and what you think of the result.

For JBL 4430 compression diaphragm replacement (D8R2425), i found 3 possibilities :

1) Radian 1225-8, may be the best quality/price ratio :
https://www.thomann.de/fr/radian_12258.htm



2)...

Here's my serial numbers for my 3 JBL models :
- JBL 4406 enclosures : SN J1104-101080 and J1104-101081
- JBL 4313B enclosures : SN 23177 and 23184
- JBL 4430 enclosures : SN 281698 and 301021
...

Turnitdown and BMWCCA, thank you.

I'm particularly interested by 4430 model that i listen every day.
I know that they were bought in march 1988 in France. So, i believe that they were built in...

Turnitdown, thank you.

I report here zonker92's review :
If you have speakers that use JBL 2425 or 2426 horn drivers, you probably know that the diaphragms are titanium, and that the earlier 2421...

Is there anybody out there ?

I can't believe that this thread is really dead ?

No one can help ?

Oh, very nice, thank you Rusty :)

hi, did someone made a comparison between JBL D8R2425 and Radian 1225-8 ?

No one knows what the thickness of the felt (or foam) should be for JBL 2425H ?

I correct what I already wrote : I know that a database or a spreadsheet exists which contains some JBL informations about their vintage products.

Does someone knows how to get it ?

I know that a database or a spreadsheet exists which contains all JBL informations. Does someone knows how to get it ?

Hi,
if this topic is still active, may be someone can help me to get further information about my JBLs :
- JBL 4406 : SN J1104-101080 and J1104-101081
- JBL 4313B : SN 23177 and 23184
- JBL...

Hello,
i'm new on this site and i don't speak well english, sorry.


I have 3 JBL models :
- JBL 4406 : SN J1104-101080 and J1104-101081
- JBL 4313B : SN 23177 and 23184
- JBL 4430 : SN 281698...