Nope, and probably would not want to hear such a setup. The two mid-high panels on each side would indeed create interference patterns (comb filtering).
Now, if you have truly huge Home Theater room with stadium seating across three rows, then one could envision doing vertically stacked CLX to gain both the additional output as well as better vertical coverage of all rows.
But then, in a room that big, dynamic speakers, horns most likely (see JBL Synthesis), would be the ticket.
If I had four CLX's, I'd order one more for the center and set up a really nice surround system, power them with five Sanders ESL monoblocks and spin some Steve Wilson BluRays and blow everyone away. Now that would be more than just a wall of sound, that's an alternate universe !