I emailed the seller this morning to ask who reconed the woofers and what recone kit was used. I figured it would be someone in Germany who did the recone and I was hoping he'd say it was a GPA kit. He just replied saying "Hello! It was re-coned from German firm "Klangmeister": http://www.klangmeister.de/index.html I don't know what kit was used, but a have the invoce form them. Regards, Radiobar36"