These speakers use what is commonly known as a 2- ½ way crossover. This is done in order to prevent “lobing” where the midrange frequencies from multiple drivers would interfere with each other and cause phase cancellations or other issues that would negatively affect performance.
In a 2.5-way crossover one woofer will act as a mid/bass driver and another will be bass driver and not operate in the midrange. Both woofers operate below a certain frequency but only one of them operates up to the frequency where the tweeter takes over. This is why when you put your ear next to the woofer you may hear slightly different sounds from each woofer.