KLH audio hosts an article explaining Hofmann's Iron Law: https://klhaudio.com/wp-content/uploads/2021/05/loudspeaker-design-hofmans-iron-law-by-henry-kloss.pd

KLH audio hosts an article explaining Hofmann's Iron Law: https://klhaudio.com/wp-content/uploads/2021/05/loudspeaker-design-hofmans-iron-law-by-henry-kloss.pdf https://klhaudio.com/wp-content/uploads/2021/05/loudspeaker-... Also, even if efficiency was not a concern (maybe you don't pay for your own electricity and you somehow managed to build superconducting voice coils and speaker cables), getting arbitrarily high pressure from an arbitrarily small driver requires arbitrarily large excursion. If you somehow overcame all the mechanical complexities of this, you'll still run into the problem of finite speed of sound. The higher the excursion the faster the cone moves for the same frequency, and at some point it's going to go supersonic, which is certainly not good for distortion.