Active Equalization of Closed-Box Loudspeaker Systems

Leach J,WM. Active Equalization of Closed-Box Loudspeaker Systems. J Audio Eng Soc. 1981;29(6):405-407. Available from: https://aes.org/publications/elibrary-page/?id=3905

@article{Leach1981_3905,
  author = {Leach, Jr., W. Marshall},
  title = {{Active Equalization of Closed-Box Loudspeaker Systems}},
  journal = {Journal of the Audio Engineering Society},
  volume = {29},
  number = {6},
  pages = {405--407},
  year = {1981},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=3905}
}

TY  - JOUR
TI  - Active Equalization of Closed-Box Loudspeaker Systems
AU  - Leach, Jr., W. Marshall
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 29
IS  - 6
SP  - 405
EP  - 407
PY  - 1981
DA  - 1981/06/06
UR  - https://aes.org/publications/elibrary-page/?id=3905
PB  - Audio Engineering Society
LA  - en
AB  - A technique is described which can be used to extend the low-frequency response of a closed-box loudspeaker system by the use of an auxiliary active equalizer which converts the overall system response to that of a fourth-order Butterworth alignment. The technique can be applied to any closed-box system having a quality factor less than 1.31. For a closed-box system with a second-order Butterworth response, the technique extends the system lower -3 dB frequency by a factor of 1.85, or 0.886 of an octave.
ER  -