The Watkins Woofer

Degraeve S, Oclee-Brown J. The Watkins Woofer. J Audio Eng Soc. 2023;71(1/2):45-52. doi:10.17743/jaes.2022.0045

@article{Degraeve2023_22030,
  author = {Degraeve, Sébastien and Oclee-Brown, Jack},
  title = {{The Watkins Woofer}},
  journal = {Journal of the Audio Engineering Society},
  volume = {71},
  number = {1/2},
  pages = {45--52},
  year = {2023},
  month = jan,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2022.0045},
  url = {https://doi.org/10.17743/jaes.2022.0045}
}

TY  - JOUR
TI  - The Watkins Woofer
AU  - Degraeve, Sébastien
AU  - Oclee-Brown, Jack
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 71
IS  - 1/2
SP  - 45
EP  - 52
PY  - 2023
DA  - 2023/01/06
DO  - 10.17743/jaes.2022.0045
UR  - https://doi.org/10.17743/jaes.2022.0045
PB  - Audio Engineering Society
LA  - en
AB  - The Watkins Woofer is an arrangement, invented and patented by William (Bill) Watkins and subsequently used by Infinity, that uses a novel technique to increase the efficiency of an infinite baffle or closed box loudspeaker. Watkins himself described succinctly the principle of operation of his dual-coil woofer, but no rigorous analysis was published. Furthermore, the self- and mutual inductances were ignored, causing a dip in the impedance magnitude. Using the same approach as Thiele and Small, the Watkins woofer is - for the first time - fully analyzed to outline the volume, bandwidth, and sensitivity trade-offs.
ER  -