Who is “Prof” Erny?
A Brief History
Prof Erny’s Music Company opened its doors in or around 1940 by professional educator and clarinetist Lawrence E. Erny Jr.. “Professor” Lawrence Erny brought music to school-aged children in “some 17 or so” parishes throughout South Louisiana. Prof was one of the first band directors in the state helping establish music programs in what has become a strong music education state. During his educator years, Professor Erny, was soon nick-named “Prof” by the young musicians and the name has stuck and has continued for over 85 years. Although the original Prof went to the big bandstand in the sky in 1981, his legacy continues throughout the hearts and spirit of today’s musicians of all ages. “Prof” believed that ALL children should be able to enjoy the unique opportunity that band, unlike the other arts, can provide. Music is a lifelong experience filled with friendships, joy and FUN!
A family tradition three generations later.
What started out with Lawrence “Prof” Erny Jr. in 1940, continued on into the 21st century with Prof and Evelyn Erny’s eldest son, Lawrence “Larry” Erny III, and his wife, Glory. Taking over the daily operations from his father in 1978, after a distinguished time as the company store manager, Larry ran the original Oil Center location until his retirement in 2020.
Two of Larry & Glory’s children, David & Mary Erny have taken over the business. David, runs the daily operations of our brick & mortar storefront, as well as purchasing, overseeing of our Reverb & Ebay stores & this new website. Mary runs the special purchases department, is a lifelong guitar pick connoisseur and authority on all things plectrum.
The faces have changed through the years, but the Excellence in Service with the personal touch of a family atmosphere has remained the same; then and now.
We have had the pleasure of the smiles and joy we have been able to share with the musicians, young & old, with some becoming famous, as well as their families, who have come through the doors of Prof Erny’s Music over the past 85 years. We at Prof Erny’s Music strive to continue the tradition, service and dedication to the betterment of the school music programs that “Prof” established many years ago.
Prof’s was here then, now, and will be there tomorrow. Carrying on in the tradition as the headquarters of school bands and a Louisiana tradition and landmark. We look forward to serving the musical community for the next 80 years to come!
The Staff
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Lawrence "Prof" Erny Jr. & Evelyn Erny
The Founder & his Wife
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Lawrence "Larry" Erny III aka "Prof II"
Owner (Retired)
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Glory Erny
Customer Service - Retired
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Mary E. Erny
Special Purchase Manager
Online Sales Specialist
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David E. Erny
Sales Manager
Store Operator
Purchasing Department
Online Site Manager
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Michelle Rich-Erny
Sales Specialist
Service Supervisor
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David Michel Erny
Computer Tech Services
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Peter de Bakersfield
Service Department
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Drewbee Erny
Store Security (Retired)
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Lawrence E. Erny IV
Prof's Advisory Council - At Large
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Mitchell "Mitch" Briggs
Prof's Advisory Council - At Large
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Hunter "The Supreme" Law
Prof’s Advisory Council - At Large

The Astatic MB100 is a professional wired microphone desk base designed for use with phantom powered condenser gooseneck microphones in conference, education, corporate, and government installations. Featuring a compact, low profile form factor, the MB100 provides a clean and unobtrusive solution for tabletop and lectern mounting while delivering reliable audio performance. The integrated red/green LED status indicator provides immediate visual feedback, clearly showing when the microphone is active or muted—an essential feature for moderated meetings and formal environments.
Engineered for flexibility and ease of use, the MB100 includes a programmable talk/mute switch that can be configured for toggle, push to talk, or push to mute operation depending on system requirements. Balanced audio output via XLR connector allows seamless integration with installed sound systems, while operation from standard phantom power (DC 24–52V) eliminates the need for external power supplies. With a solid, vibration resistant construction and compatibility with a wide range of standard gooseneck microphones, the MB100 is a dependable choice for everyday installed applications where clarity and control matter most.
Details:
Professional desk‑mounted microphone base for installed sound applications
Programmable talk/mute switch
Toggle on/off
Push‑to‑talk
Push‑to‑mute
Red/green LED status indicator for clear microphone state visibility
Balanced analog audio output
Compatible with dynamic or condenser gooseneck microphones
Wide phantom power range (DC 24–52V) for broad system compatibility
Solid, vibration‑resistant construction for tabletop stability
Clean, low‑profile design suitable for conference and lectern use
Specifications:
Product Type: Gooseneck microphone desk base
Frequency Response: 50 Hz – 20 kHz
Output Impedance: 250 Ω
Dynamic Range (typical): 100 dB (1 kHz at max SPL)
Signal‑to‑Noise Ratio: 110 dB (1 kHz, 1% THD)
Switch Function: Talk / Mute (programmable modes)
Power Requirements: Phantom power DC 24 – 52 V
Microphone Input: 3‑pin XLR female
Audio Output: 3-pin XLR male
LED Indicator: Red (mute), Green (active)
Weight: Approx. 720 g
Model #MB100
**This item is a “Special Order”, Prof Erny’s Music works with select vendors to offer products that ship directly from supplier distribution centers to your door. This reduces extra handling by third-party shippers and gives customers access to a wider selection of quality items not usually available locally. Delivery times vary, but are typically 7–14 business days to your door after the order is placed.**