Joseph D'Appolito

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Joseph A. D'Appolito
Fields BEE (1958), SMEE (1964), EE (1964) and Ph.D.(1969)
Alma mater Rensselaer Polytechnic Institute, Massachusetts Institute of Technology, University of Massachusetts Amherst
Known for D'Appolito Configuration, Contributions to DIY audio

Joseph A. D'Appolito is best known as the developer of the "D'Appolito Configuration" which was first described in his "A Geometric Approach to Eliminating Lobing Error in Multiway Loudspeakers".[1] This configuration is recognized by loudspeakers which have two midrange or woofer drivers arranged vertically above and below the tweeter[2] and implements the 3rd order (18dB/octave) crossover allowing the drivers to have similar horizontal dispersion, resulting in absence of any sudden change in directivity with frequency. The loudspeaker configuration is also known as a midwoofer-tweeter-midwoofer (MTM) configuration. D'Appolito is the author of "Testing Loudspeakers" and a contributing editor to AudioXpress magazine.[3] He is also the owner of a consulting firm, Audio and Acoustics, Ltd. whose clients include Snell Acoustics; HECO/Recoton, GmbH and Usher Audio Technology.[2]


  1. ^ AES 74th Convention, September 1983
  2. ^ a b Joseph A. D'Appolito biographical sketch
  3. ^ AudioXpress magazine contributors