Distortion Improvement in the Current Coil of a Loudspeaker

Pillonnet G, Sturtzer E, Rossignol T, Tournier P, Lemarquand G. Distortion Improvement in the Current Coil of a Loudspeaker. In: AES Convention 134. Audio Engineering Society; 2013. Paper 8844. Available from: https://aes.org/publications/elibrary-page/?id=16745

@inproceedings{Pillonnet2013_16745,
  author = {Pillonnet, Gaël and Sturtzer, Eric and Rossignol, Timothé and Tournier, Pascal and Lemarquand, Guy},
  title = {{Distortion Improvement in the Current Coil of a Loudspeaker}},
  booktitle = {AES Convention 134},
  note = {Paper 8844},
  year = {2013},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16745}
}

TY  - CPAPER
TI  - Distortion Improvement in the Current Coil of a Loudspeaker
AU  - Pillonnet, Gaël
AU  - Sturtzer, Eric
AU  - Rossignol, Timothé
AU  - Tournier, Pascal
AU  - Lemarquand, Guy
T2  - AES Convention 134
M1  - Paper 8844
PY  - 2013
DA  - 2013/05/06
UR  - https://aes.org/publications/elibrary-page/?id=16745
PB  - Audio Engineering Society
LA  - en
AB  - This paper deals with the comparison of voltage and current driving units in an active audio system. The effect of the audio amplifier control on the current coil of an electrodynamic loudspeaker is presented. In voltage control topology, the electromagnetic force linked to coil current is controlled through the load impedance. Thus, the electromechanical conversion linearity is decreased by the impedance variation, which implies a reduction of the overall audio quality. A current driving method could reduce the effect of the non-linear impedance by controlling the coil current directly, thereby the acceleration. Large signal impedance modeling is given in this paper to underline the non-linear effects of electrodynamic loudspeaker parameters on the coupling. As a result, the practical comparison of voltage and current driven methods proves that the current control reduces the voice coil current distortions in the three different loudspeakers under test.
ER  -