Audix M40 Ceiling-Mounted Condenser Microphone for Conferencing and Distance Learning
The Audix M40 Ceiling-Mounted Condenser Microphone is a professional miniature microphone designed for clear speech pickup in conference rooms, classrooms, hospitals, and commercial audio installations. Its discreet ceiling-mounted design allows the microphone to capture speech and room audio without occupying valuable table space or obstructing the room's appearance.
Engineered for high-sensitivity distance miking, the Audix M40 features a 12mm gold-vapor condenser diaphragm and a fully integrated miniature preamplifier. Its 60Hz–10kHz frequency response is optimized for intelligible speech reproduction, making it particularly suitable for video teleconferencing (VTC), distance learning, voice recognition, and presentation systems.
The standard M40 features a cardioid pickup pattern that focuses on the intended coverage area while helping reduce unwanted background sound. Additional hypercardioid and shotgun capsule configurations are available for installations requiring more directional pickup.
Installation is straightforward, requiring a 5/8-inch opening in a compatible ceiling tile. The microphone's low-profile construction blends into the ceiling, while its cable assembly provides terminal block connections for integration with professional audio equipment. For installations requiring a suitable metal plenum junction box, the optional Audix JBM40 provides an installation accessory designed for that application.
Designed, assembled, and tested by Audix in the USA, the M40 combines compact construction, RF interference protection, and professional audio performance for conferencing, educational, healthcare, and installed sound environments.
Features and Benefits
Discreet Ceiling-Mounted Microphone Design
The Audix M40 is designed to mount directly into a ceiling tile, creating a clean installation without tabletop microphones, floor stands, or visible hanging microphone assemblies.
Its compact design is particularly useful in conference rooms, classrooms, hospital rooms, and other spaces where maintaining an uncluttered appearance is important.
High-Sensitivity Distance Miking
The M40 is engineered to capture speech from a ceiling-mounted position.
Its high-sensitivity condenser design helps reproduce voices clearly when speakers are located below the microphone rather than speaking directly into a handheld or desktop microphone.
This makes it useful for video conferencing, lectures, classroom instruction, and general room audio pickup.
Optimized for Speech Intelligibility and Voice Recognition
With a frequency response of 60Hz–10kHz, the M40 is designed for speech-oriented audio applications.
Its detailed condenser capsule captures vocal articulation and helps provide intelligible speech for conferencing, presentation, and voice recognition systems.
Actual speech clarity will also depend on ceiling height, microphone placement, room acoustics, and system configuration.
12mm Gold-Vapor Condenser Diaphragm
The M40 incorporates a 12mm gold-vapor diaphragm for accurate sound reproduction and responsive speech pickup.
The condenser element is paired with a miniature integrated preamplifier to provide a high-output microphone signal for professional installed audio systems.
Cardioid Pickup with Alternative Directional Options
The standard Audix M40 features a cardioid pickup pattern that emphasizes sound arriving from the intended coverage area.
Alternative hypercardioid and shotgun configurations are available for installations requiring different pickup characteristics.
Selecting the appropriate pickup pattern helps installers tailor microphone coverage to the room layout and application.
RF Interference Protection
The M40 is engineered to resist radio-frequency interference associated with mobile phones and wireless communication devices.
This feature is especially useful in conference rooms, classrooms, and healthcare facilities where electronic devices are frequently operating near installed microphones.
Integrated Preamplifier and Phantom Power Operation
The M40 includes a miniature preamplifier within the microphone assembly.
It operates using 18–52V phantom power from a compatible professional microphone input or phantom power supply.
No separate external preamplifier adapter is required.
Simple Ceiling Tile Installation
The M40 is designed for installation through a 5/8-inch opening in a compatible ceiling tile.
Its compact design and integrated mounting arrangement simplify installation compared with larger suspended microphone systems.
The microphone cable assembly includes terminal block connections for professional audio integration.
Optional JBM40 Plenum Junction Box
For installations where plenum-rated cabling and a metal junction box are required, the optional Audix JBM40 provides a dedicated accessory for the M40.
Installers should verify all applicable building, electrical, and fire-code requirements for the installation location.
Professional Performance for Installed Audio
The M40 offers a 72dB signal-to-noise ratio, 22dBA equivalent noise level, and maximum SPL handling of at least 130dB.
These specifications support clear speech and ambient audio pickup across a variety of professional environments.
Audix M40 Key Features
- Professional miniature ceiling-mounted condenser microphone
- Designed for video teleconferencing and distance learning
- High-sensitivity design for distance speech pickup
- Optimized for voice recognition and speech intelligibility
- Suitable for conference rooms, classrooms, hospitals, and commercial installations
- 12mm gold-vapor condenser diaphragm
- Fully integrated miniature preamplifier
- Standard cardioid pickup pattern
- Hypercardioid and shotgun configurations available
- 60Hz–10kHz frequency response
- RF interference protection for use around mobile devices
- 72dB signal-to-noise ratio
- Maximum SPL handling of at least 130dB
- Requires 18–52V phantom power
- Compact, discreet ceiling-mounted design
- Installs through a 5/8-inch ceiling tile opening
- Cable assembly with terminal block connections
- Optional Audix JBM40 metal plenum junction box
- Designed, assembled, and tested by Audix in the USA
- Three-year manufacturer warranty
Audix M40 Audio Specifications
| Specification | Details |
|---|
| Transducer Type | Condenser |
| Diaphragm | 12mm Gold-Vapor |
| Frequency Response | 60Hz–10kHz |
| Standard Polar Pattern | Cardioid |
| Alternative Configurations | Hypercardioid, Shotgun |
| Output Impedance | 150 Ohms |
| Sensitivity | 37mV/Pa at 1kHz |
| Signal-to-Noise Ratio | 72dB, A-Weighted |
| Equivalent Noise Level | 22dBA |
| Maximum SPL | ≥130dB at 0.5% THD |
| Dynamic Range | 108dB |
| Power Requirements | 18–52V Phantom Power |
Audix M40 Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Audix |
| Model | M40 |
| Product Type | Ceiling-Mounted Miniature Condenser Microphone |
| Primary Application | Speech and Distance Miking |
| Preamplifier | Fully Integrated |
| Connection | Cable Assembly with Terminal Block Connections |
| Manufacturer-Listed Connector | 3-Pin Male XLR |
| Polarity | Positive Pressure Produces Positive Voltage on Pin 2 Relative to Pin 3 |
| Construction | Copper and Steel |
| Finish | Powder Coat |
| Length | 54mm / 2.1 Inches |
| Weight | 20g / 0.7oz |
| Ceiling Opening | 5/8 Inch |
| Optional Installation Accessory | Audix JBM40 |
| Warranty | 3 Years |
Recommended Applications
Video Teleconferencing (VTC): Provides ceiling-mounted speech pickup for conference rooms and video meeting systems.
Distance Learning and Classrooms: Captures instructor and classroom speech without requiring handheld microphones or desktop stands.
Conference Rooms and Boardrooms: Supports discreet microphone installations in professional meeting environments.
Hospital and Healthcare Rooms: Provides room audio pickup for compatible communication, monitoring, and conferencing systems.
Voice Recognition Systems: Offers speech-oriented microphone performance for appropriately designed voice recognition applications.
Lecture Halls and Presentation Rooms: Captures speech from ceiling-mounted positions while preserving a clean room appearance.
Ambient Room Miking: Captures room sound and general audio activity for recording or monitoring systems where permitted.
Commercial Audio Installations: Suitable for professional installed sound applications requiring a compact ceiling microphone.
Need a Compatible Plenum Junction Box?
The Audix JBM40 Plenum Junction Box is an optional accessory designed for M40 installations requiring a suitable metal junction box for plenum-rated cabling.
The JBM40 is particularly relevant for commercial ceiling installations where cable routing and junction box requirements must be addressed.
Before installation, confirm that the selected microphone pickup pattern, phantom power source, cable type, and ceiling mounting arrangement meet the project's requirements.
Why Buy the Audix M40 from Audio Supply?
Audio Supply offers professional Audix microphones and installation accessories for conference rooms, educational facilities, healthcare environments, and commercial audio systems. The Audix M40 combines discreet ceiling mounting, high-sensitivity speech pickup, and RF interference protection for professional installed audio applications.
