Breakup is important. You don’t want to drive a transducer close to or beyond breakup. This is something the designer must take into account.
The key to soft domes is that they are intrinsically damped - doped fabric! This is the key! It means that the dome adds minimal coloration to the music. This is why they are so revealing - you hear the detailed music after a transient rather than the cone vibrations after a transient. Some folks are more critical listeners than others, so not everyone will appreciate this. You can see this on a waterfall plot, the excel millenium fabric dome tweeter has the cleanest waterfall plot I have ever seen. Some metal or rigid domes come close but the extra frequency extension of rigid domes is totally at the expense of clarity where it is more important - at upper mid range frequencies.
The key to soft domes is that they are intrinsically damped - doped fabric! This is the key! It means that the dome adds minimal coloration to the music. This is why they are so revealing - you hear the detailed music after a transient rather than the cone vibrations after a transient. Some folks are more critical listeners than others, so not everyone will appreciate this. You can see this on a waterfall plot, the excel millenium fabric dome tweeter has the cleanest waterfall plot I have ever seen. Some metal or rigid domes come close but the extra frequency extension of rigid domes is totally at the expense of clarity where it is more important - at upper mid range frequencies.