Legis
04-03-2015, 11:46 PM
Hello, I discovered yesterday, while cleaning my 2446J drivers, that they actually have different revisions of the phase plug! I always though the slight differences in FR was due to other elements, but it's the phase plug after all after some testing.
The serial number of my drivers are (named A and B like in the pictures) are pretty far off: A) 16992 B) 01679
Are the two revisions of the phase plugs in 2446J to your knowledge?
Another option is that someone has put a 2446J backside cover to 2445 body? I bought the drivers from Ebay couple of years ago and they both are in very good condition and visually identical except the different phase plug.
I find the B option to behave better with my Truextent 'phragms and I'd like to find another piece of those. How do I find correct pairs for these drivers? :)
Here are the pictures and a quick draw. The A driver seems to have straight slits while the B has curved slits and they are all facing directly downwards to the throat.
http://i817.photobucket.com/albums/zz95/LegisActio/JBL%202446J/2_zpswitfvwit.jpg http://i817.photobucket.com/albums/zz95/LegisActio/JBL%202446J/phaseplugs_zpshm6ym9tm.png
The serial number of my drivers are (named A and B like in the pictures) are pretty far off: A) 16992 B) 01679
Are the two revisions of the phase plugs in 2446J to your knowledge?
Another option is that someone has put a 2446J backside cover to 2445 body? I bought the drivers from Ebay couple of years ago and they both are in very good condition and visually identical except the different phase plug.
I find the B option to behave better with my Truextent 'phragms and I'd like to find another piece of those. How do I find correct pairs for these drivers? :)
Here are the pictures and a quick draw. The A driver seems to have straight slits while the B has curved slits and they are all facing directly downwards to the throat.
http://i817.photobucket.com/albums/zz95/LegisActio/JBL%202446J/2_zpswitfvwit.jpg http://i817.photobucket.com/albums/zz95/LegisActio/JBL%202446J/phaseplugs_zpshm6ym9tm.png