Also, What exactly is the difference between overhung and underhung motor topologies? I know that an overhung desing has its voice coil windings longer than the magnetic gap, otherwise their would be 0mm xmax. But how exactly does an underhung design work? From what I heard the magnetic gap is very long and the voice coil windings are shorter than the magnetic gap. What are the advantages and disadvantages to each design?

Thanks!

An overhung coil will always keep a portion of its length within the gap. This ensures that the motor enters displacement compression relatively slowly as the driver nears Xmax. With an underhung coil, the total length of the coil is always within the magnetic gap. This design type is usually associated with high efficiency drivers and motors made this way enjoy increased linearity, reduced distortion and higher efficiency. However, once Xmax is exceeded, the underhung motor becomes rapidly non-linear, as you might well expect. This is rarely an issue though, because the overall motor/diaphragm system is designed so that Xmax is not exceeded until other parameters are nearing critical levels as well. But underhung designs are often more expensive, requiring larger and more powerful magnetic structures.