When I first herad about the Copperback, I wasn't interested in it. But the more I look into it, the more I want to try a couple out. Supposedly, it's supposed to be in the EVM12L vein, sonically speaking. But if course, since it has a neo magnet, it's really light.
For those that don't know about it:
https://celestion.com/product/199/neo_250_copperback/
For those that don't know about it:
https://celestion.com/product/199/neo_250_copperback/