Many thanks for your inputs but the rx-v663 is only 95W x 7 channels and it like another Yamaha amplifier it have a lot loss of power when you increase the power in several channels, in 7.1 setup they only gave the half of power (47 W) although my room is small I will have to increase the power to max level to I get full sound in my room, I afraid that I do that I listening only distortion instead a good sound whit this speakers, I love speakers but I thought that it was underpowered my speakers, for that reason I want a new avr.