> But it does seem more efficient than traditional speaker designs. The numbers you have mentioned do not tell that. I have a pair of 4W speakers which can mak

> But it does seem more efficient than traditional speaker designs. The numbers you have mentioned do not tell that. I have a pair of 4W speakers which can make impossible any dialogue in a 15m^2 room if working on full loudness. The secret is big but lightweight moving parts (diffusor of big square) and absence of bass.