[maurycyz]

I doubt that's going to be much of a problem: As long as the average power is within rated limits. It takes time for coils to heat up and cool down: The worst thing you can do for speakers is to play loud music on a hot day. (Music also has a high dynamic-range which maximizes mechanical loads)

Inductive kick won't be an issue either: amplifiers are designed as voltage sources, not current sources. They present a low impedance path for back-EMF to take without causing any problems.