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View Full Version : Difference Between 2445J and 2446?



Chas
12-30-2004, 11:07 AM
I have a chance to get a pair of 2445J. Is the difference in diaphragm material -i.e. Al in the 2445 and Ti in the 2446?

How would the 2445J compare to my beloved 2441's providing they had the same diapgragm materials?

I need drivers for an upcoming 2397 based project......:smthsail:

Alex Lancaster
01-02-2005, 01:51 PM
:) They are both Ti; 2445J = 4", 2" throat, 2425/6 1.75", 1" throat; There are a lot of posts of preferences between Al and Ti, Alnico and Ferrite, good luck.

Guido
01-02-2005, 03:51 PM
AFAIK there is no significant difference between 2445 and 2446.

grumpy
01-03-2005, 09:22 AM
The only difference I've been able to find in the documents for these drivers is regarding
the phase plug design description, in that the 2446 uses what is termed a "Coherent
Wave" design:

http://www.jblpro.com/pages/pub/components/2446.pdf
http://www.jblpro.com/pub/components/2445J.pdf

Do they sound any different? I wish I had the resources to find out http://audioheritage.csdco.com/vbulletin/images/smilies/smile.gif

-grumpy

Mike Caldwell
01-03-2005, 10:12 AM
Hello

The 2445 and 2446 are the same driver body. The difference is that the 2445 used a smooth dome titanium diaphragm with the diamond surround and the 2446 uses a diaphragm that has small ridges pressed into it making it stiffer.
The diaphragms are interchangeable so you can upgrade a 2445 to the 2446.
I guess at high frequency the original 2445 diaphragm would distort in physical shape and pressing ribs into the diaphragm helps eliminate the problem.

Mike Caldwell