@article{welti2006low, title = {Low-Frequency Optimization Using Multiple Subwoofers}, author = {Welti, Todd and Devantier, Allan}, journal = {J. Audio Eng. Soc}, volume = {54}, number = {5}, pages = {347--364}, year = {2006}, url = {https://www.aes.org/e-lib/browse.cfm?elib=13680} }