@conference{danley1990the, title = {The Design of a High Efficiency Servomotor-Driven Subwoofer}, author = {Danley, Thomas J. and Mapes-Riordan, Dan}, booktitle = {Audio Engineering Society Convention 89}, month = {Sep}, year = {1990}, url = {https://www.aes.org/e-lib/browse.cfm?elib=5715} }