Never hear anything about that Kole Audio subs. But I have heard Audiopipe. And needless to say, I would never ever buy an audiopipe. They ****.
I walked all over a pair of the AudioPipe Eye Candy 15s with my CVRs. We both have rangers. And I beat him by 11db.
So you can always get rid of both subs and get one good one or two good subs.