The C-Coil has extremely low resistance and can shift a large amount of power without getting over heated.
With the C-Coil, we can get very close to a de facto “zero ohm” audio inductor.
The power handling data in watt RMS were measured at 8Ω impedance using a real crossover setup. The maximum wattage handling data, relates to the maximum wattage load a given C-Coil can handle, before it impacts the inductance / performance.
The C-Coil is only for application in the a separate crossover bass section for passive home-use speakers and for passive subwoofers.