Piezo horn for a highs box

Hi I'm building 1 box for the highs of my 4 ways reggae sound system, I'm gonna use 6 or 4 EMINENCE APT80 twiters, I want to combine in the same box a piezo horn to get a strong high. Any suggestions??????

No need for the piezos. APT tweeters are really good and cover the high end well. Get 6 and array them in 2 rows of 3. Splay each row as left, forward, right. Also splay the two rows, with top row pointing horizontally and bottom row tilted down.

Remember the high frequency sound from the APT80 is like the light from a spotlight - you need one pointing right at you, with nothing in the way to be able to hear it.

Have you already got the APT80's? Have got a whole load coming up for sale. In fact they are already built into plywood top boxes with 4 in each.