My Albarry M1108 Mono-blocs are 110 Watts into 8 Ohms, my speakers are Allison 3 corner speakers, 4 Ohm, IIRC 93db effeiciency, I believe the 1108's are 180 Watts in to 4 Ohms, although they deliver over a Kw on peak delivery, all electronic gobbledygook to me, but they sound fantastic.
cheers Al