The tweeters I'm told are supposed to be decent. Once you get used to the sound they are fine. Mine also have sand in them to stiffle resonance.

I think one reason I notice such a difference in sound is going from the Altecs to these you lose a lot of presence that the horns provide so it takes some time for your mind to accept that what your ears hear is good; just different Maybe someone better versed can explain it better.