Last weekend, I upgraded my Hexagonal Tweeter to "Magic4". Magic4 is made of 4 Magic Bullets Tweeter (Bullet Tweeter + Bi-Radial horn). The horn is faced at 4 direction. The total cost is less than RM300. I believe most of you can made a better design than me.
I still do not know how good the Magic4 compare to Hexagonal. But from the review posted by users, I am quite confident Magic4 can give your BH some advantages compare to your neighbour BH.
Please Click link for Bullet Bazooka Review.