Just sharing a little tidbit of my day. I had an old original JL 12W0-4 sitting around with a broken surround that I got around to repairing today. I pulled the pushed in dust cap using q-tips and a hot glue gun. And centered the cone by quietly playing a 40 hz test tone out of a Lepai LP-2020a+. I'm going to mess around with it inverted in a 1 ft cubed sealed box to test her out. Does anyone have recommended enclosure info for these 12W0 version 1's? I'd like to make a ported box for it. Cheers!