For the lack of higher-order modes, lumped element (LE) models currently used may be insufficient to predict the system of balanced-armature receiver (BAR). We develop an LE multimode model for BAR in the frequency domain based on the techniques of mode decomposition, truncation, and selection. The validation is made by comparing with both the corresponding combined finite element (FE)–LE model and the full FE model. Numerical results prove that the developed model is not only as effective as the combined FE–LE model but also much more efficient. Additionally, an in-depth investigation performed discloses the inherent deficiency of the traditional LE model.