Replacement diaphragm for 2421A?

[Kay Pirinha]

Hello everyone,

while surfing through the offers of a well known German musical instrument supplier I've found a genuine JBL D8R2425 diaphragm as well as a Radian 1225-8. They call € 189 for the JBL and € 99 for the Radian. Should I ever encounter the need of new daphragms in my 2421A's, would they fit? At a visual inspection the look very similar to the 2421's at least. And what's the difference between the JBL and the Radian diaphragms? Can the Radians compete with the JBL's that almost cost double the money?

Best regards!

[edgewound]

Hello everyone,

while surfing through the offers of a well known German musical instrument supplier I've found a genuine JBL D8R2425 diaphragm as well as a Radian 1225-8. They call € 189 for the JBL and € 99 for the Radian. Should I ever encounter the need of new daphragms in my 2421A's, would they fit? At a visual inspection the look very similar to the 2421's at least. And what's the difference between the JBL and the Radian diaphragms? Can the Radians compete with the JBL's that almost cost double the money?

Best regards!

The JBL titanium driver is more durable for live sound, the Radian 1225-8/1225-16 is a drop-in replacement and simply sounds better for playback monitors in the studio of hi-fi.

[Kay Pirinha]

Thanks a lot, Edgewound!

Can I derive from your statement that these 2425 replacement diaphragms will both also fit into 2421 cores?

Best regards!

[edgewound]

Thanks a lot, Edgewound!

Can I derive from your statement that these 2425 replacement diaphragms will both also fit into 2421 cores?

Best regards!

Yes! and Thank you!

I just did this for a customer with a pair of 4320 Studio Monitors. Resuspended a pair of 2215B with new spider and surround, Full Service Teardown/Cleaning/Recharge of motors, adjust the moving mass to within 5% of Engineering Spec. Cleaned up a pair of 2420 and recharged the magnets, swapped out the D16R2425 with Radian 1225-16.

The customer is a husband and wife musician team that said they now hear details and clarity they never heard before with the new Radian diaphragms. She's a violonist and was especially impressed with the fidelity and non fatiguing nature of the Radian diaphragms. Their associates that came into listen noticed the improvements as well.

[Kay Pirinha]

Thank you, that's amazing! So I tend to give these Radians a try and throw it into my 2421's before installing these in my 4430 projects.

Best regards!

[BMWCCA]

Would the same be true for the 2425J in my 4345 clones? One of my stay-at-home-COVID-19 projects is to remove and examine those drivers in my system—if they ever come to their senses and figure out that car sales shouldn't be essential!

Thanks!