I have opted for a Em. Gamma 15" in ~ 100L pi-aligned plus the BMS 4540ND. They both look reasonably smooth. If I use a 2nd order textbook crossover and attenuate the 4540ND appropriately, I should be all right no?

X-over point 1900Hz as per BMS recommendation.

Any tricks you would like to share? Which horn would you use for the 4540ND? It's supposed to be for home hifi.

Thanks,

Roland