What is the difference between the JBL "2404H-1" and the JBL 2404H, Ultra-High Frequency Transducers ?
The JBL "2404H-1" with the Bi-Radial 62361 Horn is in the JBL 4612OK Loudspeaker.
JBL says 2404H-1 Diaphragm Replacement D8R075 (original) or D16R2405 maybe used.
Did JBL change diaphragms, if so is there a frequency difference?
I can only find a spec sheet on the JBL 2404H, is there a separate spec sheet for JBL "2404H-1".

Thanks,

Mr. Wizard