but if u look at the numbers the Z-680z come out on top no? the 680z are 505 rms and the Klipsch are 470 rms. so the 680z come out on top with the power, but the bass of the Klipsch is better and i think they are better made. so am like in the middle.....can u really hear the diff of power between the 2 if ur not a sound sound engineer?