You are all making some good points, Im surprised nobody has mentioned the side effects of powerful springs/suspensions to counteract the pressure force- mainly the T/S parameters. With a large spring overshadowing the spider and surround there will be almost no damping, in addition the natural frequency will be extremely high, not good for woofers. Think of sqrt(k/m) = Fs Fs is natural frequency(approximated), k is spring stiffness, and m is mass of moving assembly.
Plus the mass of these components will lower sensitivity, what kind of cone would be needed to withstand vacuum?
Plus the mass of these components will lower sensitivity, what kind of cone would be needed to withstand vacuum?