Comments on ‘‘Theory, ingenuity, and wishful wizardry in loudspeaker design—A half‐century of progress?’’ [J. Acoust. Soc. Am. 77, 1303–1308 (1985)]

Some of Augspurger’s statements about the acoustic‐suspension speaker system are questioned. These concern the nonlinearity of the air spring in the enclosure, FM distortion, the definition of the acoustic‐suspension principle as the use of a heavy cone, and the effect of the acoustic‐suspension design on electroacoustic efficiency.