Horn speakers, more so than dynamic-driver speakers, need to be very carefully matched to the room they are used in. You also have the issue raised by Plato about possible excessive noise with a highly efficient speaker being paired with potent tube monoblocks.
Perhaps Avantegarde addresses the issue of room size and compatability on its website (assuming it has a website).
Perhaps Avantegarde addresses the issue of room size and compatability on its website (assuming it has a website).