Integrated Audio Systems is an audio contracting firm located in central Illinois.  The firm specializes in the design and installation of the highest quality audio systems available.  Clients include churches, universities, industrial and commercial businesses.  

Founded in 1993 by Bill Harlan and Bob Applegate the firm has grown to include a third partner, Dave Miller, an office manager and specialists in sales and installation. 

Bill Harlan is the company President, specializing in Commercial/Industrial Sound, Bob Applegate specializes in system design and room acoustics and Dave Miller oversees all installation and service projects.  

The company currently uses the EASE acoustics and loudspeaker modeling program to assess the accuracy of all system designs concerning loudspeaker selection and placement.   All projects are custom designed to insure a high degree of client satisfaction.  Typical system specifications show minimal deviations from seat to seat for overall coverage, frequency response and intelligibility.