The Audix M55 Hanging Ceiling Microphone System is a professional suspended condenser microphone designed for conference rooms, boardrooms, classrooms, healthcare facilities, and commercial audio installations. Combining high-sensitivity speech pickup with an adjustable hanging assembly, the M55 provides clear, intelligible audio while maintaining a discreet appearance in spaces where traditional tabletop or floor-mounted microphones are impractical.
Designed for video teleconferencing (VTC), distance learning, voice recognition, and ambient room audio, the M55 features a miniature condenser microphone with integrated low-noise electronics and a 60Hz–10kHz frequency response optimized for speech applications. Its high-output design allows the microphone to capture sound from a distance, making it suitable for professional conferencing and installed sound systems.
Unlike fixed ceiling-mounted microphones, the Audix M55 provides fingertip adjustment of its hanging height up to four feet below the ceiling. The microphone can be rotated to help aim its pickup pattern toward the desired coverage area, while the optional Audix MCHANGER aiming clip provides additional angular adjustment.
The M55 supports cardioid, hypercardioid, omnidirectional, and supercardioid/shotgun-style capsule configurations, allowing installers to select coverage appropriate to the room layout. Its balanced audio output and RF interference protection help maintain clean sound in environments with mobile phones and wireless devices.
Designed, assembled, and tested by Audix in the USA, the M55 includes a ceiling mounting assembly, plenum-rated junction box, terminal block connections, and wire safety cable for a professional installation.
Features and Benefits
Adjustable Hanging Microphone for Professional Conferencing
The Audix M55 is designed to suspend from a ceiling, positioning the microphone closer to speakers and presenters than a flush-mounted ceiling microphone.
This arrangement can improve direct speech pickup in rooms with high ceilings or challenging acoustics, depending on placement and system design.
The suspended microphone's compact profile helps maintain a clean appearance in conference rooms, classrooms, and meeting spaces.
Fingertip Height Adjustment Up to Four Feet
One of the M55's most useful features is its adjustable hanging assembly.
Installers can adjust the microphone's suspension height up to four feet below the ceiling surface without removing ceiling tiles.
This allows the microphone to be positioned for the room's seating arrangement, ceiling height, and intended sound coverage.
Rotational Aiming and Optional MCHANGER Clip
The M55 mounting system provides rotation control to help orient the microphone toward the intended sound source.
For installations requiring additional angular adjustment, the optional Audix MCHANGER aiming clip provides more positioning flexibility.
These adjustments are particularly useful in conference rooms and classrooms where microphone placement must account for room layout.
High-Sensitivity Condenser Capsule for Distance Miking
The M55 incorporates a high-output miniature condenser microphone with integrated low-noise preamplifier circuitry.
Its sensitivity helps capture speech from a suspended ceiling position without requiring a handheld or desktop microphone for every participant.
The microphone's 60Hz–10kHz frequency response is optimized for clear voice reproduction.
Multiple Pickup Pattern Configurations
The M55 microphone system accommodates different capsule configurations for varying room acoustics and coverage requirements.
Cardioid: Focused pickup with reduced sensitivity to sound arriving from behind the microphone.
Hypercardioid: Tighter directional coverage for applications requiring increased isolation.
Omnidirectional: Broad pickup for more uniform sound capture around the microphone.
Supercardioid / Shotgun-Style: More directional pickup for applications requiring focused sound coverage.
Select the appropriate configuration based on the installation requirements. Multiple capsules should not be assumed to be included with a single M55 system.
RF Interference Protection
The M55 is engineered to resist radio-frequency interference associated with mobile phones and wireless communication devices.
Its balanced audio output helps reduce susceptibility to interference in professional conferencing, educational, and healthcare environments.
Integrated Low-Noise Electronics
The M55 features integrated preamplifier circuitry designed for high-sensitivity speech pickup.
With a 22dBA equivalent noise level and 72dB signal-to-noise ratio, it provides professional microphone performance for speech and room audio applications.
The microphone operates using 18–52V phantom power from compatible professional audio equipment.
Simple Ceiling Installation
The M55 is designed for installation through a single 5/8-inch opening in a compatible ceiling tile.
Its mounting system allows height and rotation adjustments from below the ceiling, simplifying final microphone positioning.
This makes the M55 a practical solution for professional AV contractors and commercial audio installers.
Plenum-Rated Junction Box and Safety Cable
The M55 system includes an airtight, plenum-rated junction box that houses the terminal block cable connections.
A wire safety cable provides an additional restraint for the suspended microphone assembly.
Installers should follow applicable building, electrical, and seismic requirements for the project.
Designed for Commercial and Institutional Audio Systems
The M55 is well suited for spaces requiring reliable speech pickup without microphones positioned on desks or tables.
Its adjustable suspension, directional options, and discreet appearance make it especially useful for boardrooms, educational facilities, healthcare environments, and installed conferencing systems.
Audix M55 Key Features
- Professional hanging ceiling condenser microphone system
- Designed for video teleconferencing and distance learning
- High-sensitivity distance miking for clear speech pickup
- Optimized for voice recognition and conferencing applications
- Adjustable hanging height up to four feet below the ceiling
- Fingertip height adjustment without removing ceiling tiles
- Rotational aiming control for microphone positioning
- Optional Audix MCHANGER clip for additional angular adjustment
- Cardioid, hypercardioid, omnidirectional, and supercardioid/shotgun-style configurations
- Integrated low-noise preamplifier circuitry
- 60Hz–10kHz frequency response
- RF interference protection
- Balanced microphone output
- Requires 18–52V phantom power
- Installs through a single 5/8-inch ceiling opening
- Includes airtight, plenum-rated junction box
- Terminal block connections for installed audio systems
- Wire safety cable for additional restraint
- Discreet design for commercial and institutional spaces
- Designed, assembled, and tested by Audix in the USA
- Three-year manufacturer warranty
Audix M55 Audio Specifications
| Specification | Details |
|---|
| Transducer Type | Condenser |
| Frequency Response | 60Hz–10kHz |
| Pickup Pattern Options | Cardioid, Hypercardioid, Omnidirectional, Supercardioid/Shotgun-Style |
| Output Impedance | 150 Ohms |
| Sensitivity — Cardioid | 38mV/Pa at 1kHz |
| Sensitivity — Hypercardioid | 32mV/Pa at 1kHz |
| Sensitivity — Omnidirectional | 40mV/Pa at 1kHz |
| Sensitivity — S Version | 60mV/Pa at 1kHz |
| Equivalent Noise Level | 22dBA |
| Signal-to-Noise Ratio | 72dB |
| Maximum SPL | ≥130dB |
| Dynamic Range | 108dB |
| Power Requirements | 18–52V Phantom Power |
| Output | Balanced |
Audix M55 Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Audix |
| Model | M55 |
| Product Type | Hanging Ceiling Condenser Microphone System |
| Mounting Style | Adjustable Suspended Ceiling Mount |
| Maximum Hanging Adjustment | Up to 4 Feet |
| Ceiling Opening | 5/8 Inch |
| Microphone Connector | Terminal Block |
| Preamplifier | Integrated |
| Microphone Construction | Aluminum and Zinc Alloy |
| Finish | White |
| Microphone Length | 54mm / 2.1 Inches |
| Microphone and Cable Weight | 70g / 2.4oz |
| Junction Box and Safety Cable Weight | 499g / 17.6oz |
| Junction Box | Airtight, Plenum-Rated |
| Safety Restraint | Wire Safety Cable |
| Optional Aiming Accessory | Audix MCHANGER |
| Warranty | 3 Years |
Recommended Applications
Video Teleconferencing (VTC): Captures participant speech in professional conference rooms and video meeting environments.
Boardrooms and Meeting Rooms: Provides discreet overhead microphone coverage without occupying conference table space.
Distance Learning: Supports instructor and classroom speech pickup in educational environments.
Lecture and Training Rooms: Offers adjustable microphone placement for presentations, lectures, and training sessions.
Hospitals and Healthcare Facilities: Provides ceiling-mounted audio pickup for compatible communication and conferencing systems.
Voice Recognition Applications: Supports speech-oriented systems where microphone positioning and intelligibility are important.
Ambient Room Miking: Captures general room sound for recording, monitoring, and other authorized applications.
Commercial AV Installations: Suitable for professional installed audio systems requiring a suspended microphone with adjustable positioning.
Need an Audix MCHANGER Aiming Clip?
The Audix MCHANGER is an optional aiming accessory for compatible Audix miniature microphones.
For M55 installations requiring additional microphone angle adjustment, the MCHANGER can help position the capsule toward the intended sound source.
The M55 already includes its adjustable suspension assembly, terminal block junction box, and safety cable, so a separate junction box is not normally required for the standard system.
For best results, select the microphone pickup pattern and suspension height based on ceiling height, seating arrangement, room acoustics, and the intended coverage area.
Why Buy the Audix M55 from Audio Supply?
Audio Supply offers professional Audix microphones and installation accessories for conference rooms, schools, healthcare facilities, and commercial AV systems. The Audix M55 combines adjustable ceiling suspension, high-sensitivity speech pickup, and professional installation features for discreet conferencing and room audio applications.
