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badman
02-22-2010, 12:33 PM
Anyone have a diagram with a cross sectional (or anything that gives some information) of the phase plug assembly used in JBL compression drivers (2425 2426, others). They describe it as concentric exponential horns in the lit, but I've not been able to find a good diagram.

Thanks.

Robh3606
02-22-2010, 12:52 PM
Take off the back cap pull the diaphram and backlight it. You can get a very good look at it that way.

Rob:)

grumpy
02-22-2010, 02:06 PM
http://www.audioheritage.org/vbulletin/showpost.php?p=128533&postcount=60

Mike Caldwell
02-22-2010, 02:59 PM
Here's a link back to JBL library to a page with a LE 85 driver cut away.
http://www.lansingheritage.org/images/jbl/catalogs/1974-home/page12.jpg

badman
02-24-2010, 01:42 PM
Thanks! I don't want to open the driver and pull the phragm for fear of misaligning it, but I may have to, to get a better look.

Thanks for the assist guys.

jcrobso
02-24-2010, 02:35 PM
Thanks! I don't want to open the driver and pull the phragm for fear of misaligning it, but I may have to, to get a better look.

Thanks for the assist guys.
The cut away shows far more than you could see by pulling the diagram.
FYI: the diagram has locating pins, but be careful none the less.

ivica
08-19-2010, 07:59 AM
Anyone have a diagram with a cross sectional (or anything that gives some information) of the phase plug assembly used in JBL compression drivers (2425 2426, others). They describe it as concentric exponential horns in the lit, but I've not been able to find a good diagram.

Thanks.

you can se phase plug for 2440 model.

jerry_rig
08-19-2010, 10:24 AM
Here's a good shot: