The subject of this study is to investigate non-linear behavior of air in a horn-loaded low frequency speaker device. Research and development of low frequency transducers continues to improve their linearity of excursion trough linearization of suspension compliance and BL factor as well as steadily increasing thermal power handling. The use of those latest transducers promises to achieve unprecedented efficiency and sound pressure levels, especially when combined with high compression

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... ding. This raises questions: what is the limiting factor of efficiency in those devices while retaining non-audible distortion? Should the transducers be improved or we have reached the limits of air non-linearity? This paper will hopefully give an insight on answers to those questions, trough analyzing a set of measurements and tests conducted with a prototype horn-loaded low-frequency loudspeaker device. High signal behavior of a technologically advanced, professional transducer was evaluated with and without horn-loading to study the effects of compression chamber in those extreme working conditions.