AES Europe 2026

This paper investigates mid-to-high-frequency distortion in
traditional electrodynamic loudspeakers arising from
current-dependent nonlinearity in the magnetic circuit.
Through theoretical analysis, finite-element simulations
; experimental validation, the dominant distortion
mechanisms are identified. To mitigate distortion while
maintaining a stable frequency response, an improved
magnetic circuit is proposed, which introduces longitudinal
slits to suppress surface-concentrated eddy currents.
Experimental results demonstrate that the modified circuit
achieves greater distortion reduction compared with
conventional designs. As the improvement relies solely on
structural modifications without changing the ferromagnetic
materials, the proposed design offers a practical;
cost-effective solution for engineering applications.