Details Already Known!
Suggest you reread my posts on this matter.
"R" is for radius:
At R=1", (2.540 cm), per the manufacturer, the horn has a flare angle of 7 deg.
At R=0.75 (1.905 cm) the JBL driver has a flare angle of 0 deg.
"A" is for angle, the third column of data in my adapter post and it is given for each end and for every cm in between.
Regards,
WHG
I am not so sure the 2452 is really suitable for the LeCleach, adapter or not and be a compromise what ever you do. I am also aware the JBL paper has faults, more than the one you pointed out.
About 7 deg we should also know what angle the horn will have if cut to 2". Should be a steeper angle if not much.
About your adapter, have you calculated what flare it will have?
Suggest you reread my posts on this matter.
"R" is for radius:
At R=1", (2.540 cm), per the manufacturer, the horn has a flare angle of 7 deg.
At R=0.75 (1.905 cm) the JBL driver has a flare angle of 0 deg.
"A" is for angle, the third column of data in my adapter post and it is given for each end and for every cm in between.
Regards,
WHG

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