I will say the Bose 901 will play awfully loud but It took alot of power to do it.If i remember correctly they were rated at 89db.Also there was'nt alot of detail to them.Now the M80's will play just as loud if not louder and they do'nt need much power to do so and the sound is crystal clear. Also the 901's cost $1400.00 and I got my M80's for $990.00usd through the outlet store.And believe me I checked every square inch of these speakers and ca'nt see anything wrong with them they look perfect to me. .
