2450 Dia

[Maron Horonzakz]

Boy now Im really confused!!!! I thought the 2450SL was smooth Plus the aquaplaz coating. Like the 475......We need photos of all the large diaphrams and properly labled to stop this confusion. I thought JBl was going to list this for us in due time. Well its now DUE.

[4313B]

"I thought JBl was going to list this for us in due time."

We've been working on other things. The diaphragms have taken a back seat for now.

Niklas, use the original diaphragms for the 475Nd's (D8R475ND). The S9500 is a pretty tight system. I would recommend keeping it as intended.

[Maron Horonzakz]

Do I have to throw a snit fit & pee all over the place? I never get what I want "sniff"

[Earl K]

Maron,

Boy now Im really confused!!!! I thought the 2450SL was smooth Plus the aquaplaz coating.

- It is .
- I have (2) 2450SL that are smooth with an aquaplas coating . I believe JBL just takes a stock 2445 ( 8 ohm Ti ) diaphragm and adds the aquaplas. That "works" because they are essentially taking their most "under-damped" R&R 4" diaphragm and adding a bit of damping to it ( to make it more HiFi acceptable ) Understand, this is just my own opinion/editorial . BTW, IME, JBLs' 8 ohm diaphragms are more underdamped than their 16 ohm varieties .

- SubWoof is the expert on all the combinations & permutations of these things .

[Maron Horonzakz]

Earl K......Thank you I feel better now.

[subwoof]

Greetings o seekers of the grail....

I will post a group photo of the JBL large format diaphrams soon. I will be laid up while I recover from hernia surgery ( DAMN those 4345's ) next week and can dig thru the "wall of shame" in the shop.

Might not have a D8R2450SL-a so I might have to spraypaint a 2450 for the group shot ( assuming I have 2 )

I will include the 3" variant and also some examples of altec and gauss if they are still there.

And for the DIY guys, a group shot of the small format thread-on ( 2412,16,17,18 ) types.
subwoof

[spkrman57]

I have always been curious of the different diaphrams used in compression drivers.
Ron

[Guido]

Come on!

Please post the picks!

[paragon]

Thank you all four your answers !!

Eckhard

[paragon]

Just hear "Smooth Operator" from Shade.
Face to face....
He`s heart is cold....

[paragon]

Its like a Cannonball !
What´s it ???

[4313B]

What!?

I'm confused...

[stevem]

Has anyone listened to ribbed vs. smooth diaphragms? How do they sound different? Do the ribs have an effect at low, as well as high spls?



I am using 2450SL drivers which (I believe) have smooth, aquaplas coated diaphragms. I think a later version, the 2450SL-A, added the ribs. Does anyone know if this is worth changing diaphragms for? Thanks.

[speakerdave]

I don't know the answer to your question, but I would like to add to the confusion by saying that I just received shipment on a (sealed box) NOS D16R2451SL diaphragm and it is smooth and coated. I plan to fit it into one of my 2447's and give a listen.

David

[subwoof]

I mentioned to the seller that the diaphram didn't match the box. He elected not to edit his listing. What you have is a D16R2450SL. The 16 ohm version is/was used in the HLA touring products and I suspect also as one of the japanese variants.

It would make an excellent upgrade for the 2440 assuming the purists aren't offended. I used them in floor wedge monitors and it tamed them quite well.



sub