I didn't mean to imply that coaxials are more easily driven due to the fact that they are coaxials. To clarify, I guess what I was getting at is that most (but not all) coaxials tend to be "budget-level" speakers that are designed with the idea that end users will likely power them off of a head unit. Accordingly, they tend to sound pretty good off of a head unit. On the other hand, components usually feature more elaborate crossovers and are designed with the idea that the end user will be an "enthusiast" who most likely owns an amplifier, and are often (but not always) less efficient than the same brand's entry-level coaxials. I don't know if it's the lesser sensitivity or greater number of parts in the crossover or something else, but from my experience at least decent components almost always sound a bit lifeless without an amp.
Hope that cleared up my earlier post.
