May of us have heard ribbon tweeters and even some Heil air motion transformer tweeters and planar types. One thing that I have noticed in ribbon tweeters (made of aluminum in all cases so far) is that they tend to have a "chalky" type sound like a "cha" sort of sound that is sort of hollow, cold, and clinical sounding. Certain Aurum Cantus speakers in particular exhibited this as well as the new high end series Monitor Audio stand mounted speaker.
Is it the inherent resolution capabilities of a well designed ribbon tweeter in general or is it an inherent sound trait to aluminum ?
Can a ribbon tweeter be made out of beryllium instead of aluminum or even copper despite its weight being much higher and thus negating some portion of the inherent benefits and reasons for ribbons so that a warmer sound is possible ?