The electrodynamic loudspeaker is a strongly nonlinear system. The main causes of nonlinearity are the nonlinear stiffness of the suspensions and the nonuniform distribution of the magnetic flux density along the air gap in the magnetic circuit. A third cause, the nonlinear voice-coil inductance is often underestimated. The electrical impedance of the voice-coil in the low frequency range is considered usually as a pure resistance, and the influence of its inductance is neglected : this is a reason of the underestimation of its nonlinearity. The voice-coil inductance depends on both the displacement of the voice-coil and the current intensity flowing through it. Additionally, the reluctance force proportional to the square of the current appears in the mechanical part of the system and depends on the voice-coil displacement too. This paper studies the influence of the voice-coil nonlinearity. The differential equation system has been derived and is solved using numerical methods. The harmonic distortions as well as the intermodulation ones have been computed. The results show that the influence of the voice-coil nonlinearity is significant - particularly for intermodulation distortions. This influence is weaker than the influence of the force factor nonlinearity, but stronger that the influence of the suspensions nonlinearity. The influence of the different terms in the nonlinear differential equation system is also tested.