Investigation of Current Driven Loudspeakers

Schneider H, Agerkvist FT, Knott A, Andersen MAE. Investigation of Current Driven Loudspeakers. In: AES Convention 138. Audio Engineering Society; 2015. Paper 9292. Available from: https://aes.org/publications/elibrary-page/?id=17716

@inproceedings{Schneider2015_17716,
  author = {Schneider, Henrik and Agerkvist, Finn T. and Knott, Arnold and Andersen, Michael A. E.},
  title = {{Investigation of Current Driven Loudspeakers}},
  booktitle = {AES Convention 138},
  note = {Paper 9292},
  year = {2015},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17716}
}

TY  - CPAPER
TI  - Investigation of Current Driven Loudspeakers
AU  - Schneider, Henrik
AU  - Agerkvist, Finn T.
AU  - Knott, Arnold
AU  - Andersen, Michael A. E.
T2  - AES Convention 138
M1  - Paper 9292
PY  - 2015
DA  - 2015/05/06
UR  - https://aes.org/publications/elibrary-page/?id=17716
PB  - Audio Engineering Society
LA  - en
AB  - Current driven loudspeakers have previously been investigated but the literature is limited and the advantages and disadvantages are yet to be fully identified. This paper makes use of a non-linear loudspeaker model to analyze loudspeakers with distinct non-linear characteristics under voltage and current drive. A multi tone test signal is used in the evaluation of the driving schemes since it resembles audio signals to a higher degree than the signals used in total harmonic distortion and intermodulation distortion test methods. It is found that current drive is superior over voltage drive in a 5" woofer where a copper ring in the pole piece has not been implemented to compensate for eddy currents. However the drive method seems to be irrelevant for a 5" woofer where the compliance, force factor as well as the voice coil inductance has been optimized for linearity.
ER  -