Tweeter
Midrange
Bass- Midrange
Technology
To understand the advantage of this elaborate production, the general requirements to a speaker cone can be summarised as follows.
It should be substantially 1. easy 2. stiff and 3. provided with high interior absorption. Since these claims are constructive mutually contradictory, all conventional membrane materials are extremely full of compromises. And at least one of the requirements mentioned above can be described as unsatisfactory.