e3 Diagnostics St. Louis opened in 1988 as GNS Audiometrics, Inc. As one of our two founding employees, Dave Stewart started as a Service Manager and eventually took on the role of Regional Sales Manager in 1996. As one of his first orders of business, he hired current technician Jay Feco to head up the service department.

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of Gordon Stowe.
e3 Gordon Stowe St. Louis

Eventually, our name changed from GNS Audiometrics, Inc. to Gordon Stowe, but our vision and dedication to customer service remained unchanged. We’ve even added more technicians to increase the output of our service department, and an Office Assistant to improve our administrative and customer service processes.

Each member of our St. Louis area team of professionals has extensive backgrounds in the following service areas:

  • Electronics Engineering
  • Telecommunications
  • Field Service
  • Medical Equipment Calibration and Repair
  • Hearing Healthcare Product Service and Repair
  • PC Networking
  • Sound Booth Assembly

We strive to provide our customers with a more service-based and consultative approach.  This means we put emphasis around helping you understand your audiology equipment options so you can make good decisions based on your facility needs and budget. Our NASED-Certified technicians also work with your to ensure your audiological instruments are calibrated and working properly on a daily basis.

In need of a new audiometer, tympanometer, OAE screener, or hearing instrument fitting system? How about repair or calibration services on your current instruments? Get in touch with us today! We'd love to chat with you and guide you through our expansive product catalog to find the perfect device for you!

Your Local Experts

e3 Gordon Stowe St. Louis is a leading distributor of audiology equipment in St. Louis and Southern Illinois. With years of combined experience, our experts provide unmatched consultation, calibration, and repair services. Get in touch with us today to learn more!

  • e3 Expertise

    Katie Rapp

    Regional Sales Manager
    (636) 379-6435

  • jay-feco-stl

    Jay Feco

    Service Technician
    (636) 379-6435

  • alexandria-joggerst-stl

    Alexandria Joggerst

    Service Technician
    (636) 379-6435

  • deedee-renfroe-stl

    DeeDee Renfroe

    Office Assistant
    (636) 379-6435

  • josh-nelson-stl

    Joshua Nelson

    Office Assistant
    (636) 379-6435

Contact e3 Diagnostics St. Louis

710 North Ellerman
Wentzville, MO 63385
Office: (636) 379-6435
Fax: (636) 379-6439

  • e3 Expertise


    Our staff of audiologists, hearing instrument specialists, and NASED-certified technicians offers you unparalleled expertise. We take a consultative approach to learn your pain points so we can equip you with the right audiology instruments to meet your unique needs.

  • e3 Excellence


    Our products and customer service meet the highest standards of excellence. We only provide audiology equipment and supplies from the most trusted manufacturers, and only employ the audiology world’s most skilled technicians and sales consultants.

  • e3 Everyday


    Wherever you are located in the United States, there is an e3 office within arm’s reach. This saves you time and money, and allows us to easily work with you on an everyday basis.