...not
http://www.jblpro.com/catalog/genera...?PId=421&MId=2
http://www.jblpro.com/catalog/genera...?PId=425&MId=2
http://www.jblpro.com/catalog/genera...?PId=426&MId=2
These supertweeters from the dance club serie appear to be... Selenium ones
Selenium ST400 :
http://www.lautsprechershop.de/pdf/s...st400_trio.pdf