My kanger sub box mini kit that I recently bought has had issues since I've gotten it with the kanger pre made coils, the coil that came with it read .5 Ohms but when I tried to fire my mod with this coil the Ohms go to 0 and its impossible to use. My friend built me a coil so it would work for a month but than when I went to replace it all my coils were having th same problem as in the beginning, I've hardly used my Kbox it seems like they shipped me an Fd up one.