Does anyone know if there is a difference between the JBL XPL-200 and the JBL XPL-200A?

Was there an update in 200A, if so, what is different? I believe they were only release for about 3 years, between 1989 and 1992.

I have been told that the earlier models came with aluminum voice coil drivers compared to the later models that came with copper voice coil lower efficiency units. What years carried which drivers, if this is the case?

Are the copper voice coils still available?

Could these speakers have been release in different countries, being exactly the same, except one set of coutries sold them as XPL-200 and other countries sold them as XPL-200A?

Look forward to your reply!!

Cheers
Mark