Some of you guys are kind'a obsessive about all this and it seems a bit snobby. I had a set of 2420s with Radians that were properly installed by a tech, "bumped in" and they worked and sounded fine and sounded better to me than brand new 2427s I had at the time. And I saved a few bucks.

There are scads of these compression drivers around, they're all over the place. I've been given the things, they're not family heirlooms nor Holy Relics. They're machines, that's all. Better to have them working with Radians than being useless lumps sitting on a shelf.