Recording Monitor Loudspeakers

  • John M. Eargle


The term “monitor loudspeaker” is loosely applied to almost any loudspeaker used for monitoring recorded product at any stage in sound production or postproduction. In a more restrictive sense the term applies to products that are widely accepted in monitoring operations and have, to some extent, been modified or designed to meet a list of performance attributes determined by recording and broadcast engineers. Broadly speaking, those attributes are:
  1. 1.

    Extended bandwidth. The range from 40 Hz to 16 kHz (± 3 dB) represents the minimum acceptable for a full-size monitor. Smaller monitors should be just as flat across their passband, but the allowable LF limit may be raised somewhat.

  2. 2.

    Flat frontal angle response. The bandwidth stated in item 1 should be uniform over a horizontal beamwidth of ± 15° and a vertical beamwidth of ± 5°, both with respect to the forward axis.

  3. 3.

    Controlled power response. The DI of the system should be free of any deviations exceeding ±3 dB over the range from 250 Hz to 10 kHz.

  4. 4.

    Accurate time domain response. The group delay of the system should fall within the Blauert and Laws criteria (see Section 5.7).

  5. 5.

    Accurate stereophonic imaging. If the loudspeaker is not inherently of horizontal mirror image symmetry, it should be offered in separate left and right models so that symmetrical listening geometry can be achieved.



Control Room Monitor System Pink Noise Musical Instrument Digital Interface Monitoring Space 
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  1. Augspurger, G., “The Importance of Speaker Efficiency,” Electronics World, January 1962.Google Scholar
  2. Augspurger, G., “Versatile Low-Level Crossover Networks,” db Magazine (March 1975).Google Scholar
  3. Augspurger, G., “Loudspeakers in Control Rooms and Living Rooms,” in Proceedings of the Audio Engineering Society 8th International Conference, Washington, DC (1990).Google Scholar
  4. Cooper, J., Building a Recording Studio, Recording Institute of America, New York (1978).Google Scholar
  5. Davis, D., and Meeks, G., “History and Development of the Control Room Concept,” Preprint No. 1954, Audio Engineering Society Convention, Los Angeles (1982).Google Scholar
  6. Eargle, J., “Equalizing the Monitoring Environment,” J. Audio Engineering Society, Vol. 21, No. 2 (1973).Google Scholar
  7. Eargle, J., “Requirements for Studio Monitoring,” db Magazine (February 1979).Google Scholar
  8. Eargle, J., Handbook of Recording Engineering, 3rd ed., Chapman & Hall, New York (1995).Google Scholar
  9. Eargle, J., and Engebretson, M., “Survey of Recording Studio Monitoring Problems,” Recording Engineer/Producer, Vol. 4, No. 3 (1973).Google Scholar
  10. Engebretson, M., “Low Frequency Sound Reproduction,” J. Audio Engineering Society, Vol. 32, No. 5 (1984).Google Scholar
  11. Fink, D., “Time-Offset & Crossover Design,” J. Audio Engineering Society, Vol. 28 (1980), No. 9.Google Scholar
  12. Lansing, J., “The Duplex Loudspeaker,” J. Society of Motion Picture Engineers, Vol. 46 (1946), pp. 212–219.Google Scholar
  13. Smith, D., Keele, D., and Eargle, J., “Improvements in Monitor Loudspeaker Design,” J. Audio Engineering Society, Vol. 31, No. 6 (1983).Google Scholar
  14. Thuras, et al., J. Acoustical Society of America, Vol. 6, No. 3 (1935).Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • John M. Eargle

There are no affiliations available

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