I was wondering if those in the know could shed some light on this subject. I'm sure many of us are very aware of some of the more efficient speakers out there (Klipsch comes to mind), and the whole ratio of power to loudness et al. But my question is: can high efficiency be a disadvantage to sound quality when using a relatively high-powered separate amp? Perhaps more to the point (and maybe this should go in the amp/receiver section), does a quality power amp have a certain 'sweet zone' of power that sound the best? I realize that certain Class A/B amps try to improve upon low-level performance by running class A at low volumes. Do amps want to be pushed to a certain level to be happy? Sorry if this sounds silly....I'm used to thinking in terns of tube guitar amps that generally want to be pushed pretty hard to sound good (even though that means distortion/compression).