Ivica, (and others ) ;
Now I have a new 1 " PWT, attached to the 2425H driver. In fact two drivers....
Drivers are with close serials, with two original JBL dias.
Two FRs are so close that I think that everything is exactly as it should be- no damage of any kind,
and also magnet flux is probably unaffected by age. ..
The problem is that it does not look like the one published in JBL documentation...
( http://www.google.com/url?sa=t&rct=j...41018144,d.bGE , Figure Nr. 6)
Response is falling down 6 db/oct from 700 Hz onwards, as if the dia. mass breakpoint is around 500 Hz instead around 3500 Hz...
Has anyone ever seen independently published (not by JBL) PWT graph for 2425H driver?
1. Line (Yel) 2425H #1, 1" PWT
2. Line (Gry) 2425H #2, 1" PWT
3. Line (Magenta) 2404H-1, 1/2" PWT
Third line includes 6 dB correction for difference in PWT diameter ( 1/2" vs. 1" )
Absolute SPL is not calibrated, but relative differences are correct.