They are an extreme - lightweight and extremely rigid. Unfortunately, this means they are not that good overall. The approach to building a driver is a balance of many conflicting properties. For sure they are extremely lightweight, so ceramic drivers absolutely excel at linearity (pistonic behavior) but the price you pay is in resonance from ringing. This tends to create what I call a splashy sound compared to well designed damped drivers (pulp/paper/doped/fabric/polypropylene etc.)
Those little dots you see on the accutons are there for a reason - to try and compensate for the overly strong ringing problem. Speaker manufactures will also use "notch" filter with lightweight highly rigid cones to help compensate.
Of course, all designs are a compromise but my opinion is that it is best not to go for an extreme in the diaphragm but to choose a material to try to balance conflicting objectives. A design that requires heavy compensation for unwanted properties is not good design to begin with.
Just two cents... I understand those who will say "oh but it measures so well" on a frequency response plot...
Those little dots you see on the accutons are there for a reason - to try and compensate for the overly strong ringing problem. Speaker manufactures will also use "notch" filter with lightweight highly rigid cones to help compensate.
Of course, all designs are a compromise but my opinion is that it is best not to go for an extreme in the diaphragm but to choose a material to try to balance conflicting objectives. A design that requires heavy compensation for unwanted properties is not good design to begin with.
Just two cents... I understand those who will say "oh but it measures so well" on a frequency response plot...