The Audix MB8455 MicroBoom Microphone System combines an 84-inch carbon fiber boom with the high-output Audix M1255B cardioid condenser microphone for professional choir, orchestra, theater, and ensemble miking. Designed for applications requiring extended microphone reach and discreet placement, the MB8455 allows sound engineers to position a miniature microphone above or in front of performers without placing bulky microphone stands directly in the performance area.
Featuring a lightweight 7-foot carbon fiber boom, the MB8455 is particularly effective for large choirs, orchestral sections, houses of worship, and theater productions. Its extended reach makes it easier to capture sound from elevated or hard-to-access positions while maintaining clean sightlines for performers and audiences.
The included Audix M1255B high-sensitivity condenser microphone is specifically designed for distance miking. Its 12mm gold-vapor diaphragm, integrated miniature preamplifier, and 50Hz–19kHz frequency response provide detailed vocal and acoustic instrument reproduction. The cardioid pickup pattern helps focus on the intended sound source while reducing unwanted sound from behind the microphone.
An adjustable clutch assembly with a flexible steel gooseneck provides control over boom angle, rotation, and microphone positioning. Internally routed shielded cable helps maintain a clean audio signal path and professional appearance, while the included 25-foot shielded cable connects the microphone system to compatible audio equipment.
The MB8455 is supplied as a complete MicroBoom system with the 84-inch carbon fiber boom, M1255B cardioid microphone, clutch assembly, microphone cable, and windscreen. Designed, assembled, and tested by Audix in the USA, it provides a lightweight, portable solution for professional distance miking.
Features and Benefits
Extended 84-Inch Carbon Fiber Boom
The Audix MB8455 features an 84-inch (2134mm) carbon fiber boom designed to reach sound sources that are difficult to access with conventional microphone stands.
Its seven-foot length is especially useful for large choir formations, orchestral sections, theater stages, and elevated microphone positions.
The extended reach allows the microphone stand to be positioned farther away from performers, helping reduce visual obstructions on stage.
High-Output Audix M1255B Condenser Microphone
Unlike MicroBoom packages equipped with the standard M1250B microphone, the MB8455 includes the high-sensitivity Audix M1255B.
The M1255B is designed for distance miking applications where the microphone must capture voices or acoustic instruments from farther away.
Its high-output condenser design is particularly valuable for choir ensembles, orchestral groups, and other applications where close microphone placement is impractical.
Ideal for Choirs and Houses of Worship
The MB8455 provides a discreet way to capture choir performances without hanging microphones permanently from the ceiling.
The long carbon fiber boom can extend toward choir sections while the supporting microphone stand remains away from the primary performance area.
This makes the system suitable for churches, school auditoriums, concert halls, and other venues requiring flexible microphone placement.
12mm Gold-Vapor Condenser Diaphragm
The included M1255B features a 12mm gold-vapor diaphragm designed to capture detailed vocal and acoustic instrument sound.
Its 50Hz–19kHz frequency response provides natural reproduction of ensemble vocals, orchestral instruments, and ambient performance sound.
The integrated miniature preamplifier supports high-sensitivity pickup while maintaining the microphone's compact size.
Cardioid Pickup Pattern for Focused Sound Capture
The standard MB8455 includes an M1255B cardioid microphone.
The cardioid pattern emphasizes sound arriving from the front of the microphone while reducing sensitivity to sound arriving from behind.
This can help control unwanted pickup from adjacent performers, stage monitors, and surrounding room sound when the microphone is positioned correctly.
For applications requiring a tighter pickup pattern, the MB8455HC is available with the M1255BHC hypercardioid microphone.
Lightweight and Rigid Carbon Fiber Construction
The MicroBoom's carbon fiber rod provides a combination of low weight and rigidity.
The 84-inch boom weighs approximately 111g (4oz) without the microphone and clutch assembly, making it significantly lighter than many conventional extended metal boom arrangements.
Its slim construction also helps preserve a clean, unobtrusive appearance during performances.
Flexible Gooseneck and Adjustable Clutch Assembly
The MB8455 includes a clutch assembly with a flexible steel gooseneck for positioning the carbon fiber boom.
The adjustable design provides control over the boom's angle, rotation, and orientation, allowing sound engineers to aim the microphone toward the desired sound source.
The assembly attaches to a compatible microphone stand.
Internally Shielded Microphone Cable
High-quality shielded cable is routed internally through the carbon fiber boom.
This helps protect the microphone signal while eliminating the need to run exposed cable along the outside of the boom.
The included 25-foot shielded microphone cable provides the connection to compatible professional audio equipment.
RF Interference Protection
The included M1255B condenser microphone is engineered to resist radio-frequency interference from mobile phones and other wireless devices.
This helps maintain clean audio in live performance, recording, and presentation environments.
Flexible Stage and Recording Applications
The MB8455 can be positioned horizontally or vertically using a suitable microphone stand and mounting arrangement.
Its extended reach makes it useful for overhead choir miking, orchestral section recording, live theater, acoustic ensembles, and location recording.
The MicroBoom platform also supports compatible Audix Micros Series microphones for applications requiring alternative pickup patterns or output characteristics.
Audix MB8455 Key Features
- Complete 84-inch carbon fiber MicroBoom microphone system
- Includes high-output Audix M1255B cardioid condenser microphone
- Designed for distance miking of choirs, orchestras, and ensembles
- Seven-foot boom provides extended reach for hard-to-access sound sources
- Lightweight, rigid carbon fiber construction
- Low-profile appearance for professional stage productions
- 12mm gold-vapor condenser diaphragm
- 50Hz–19kHz microphone frequency response
- High-sensitivity cardioid microphone for focused sound pickup
- Integrated miniature microphone preamplifier
- RF interference protection
- Adjustable clutch assembly with flexible steel gooseneck
- Control over boom angle, rotation, and microphone position
- Internally routed shielded microphone cable
- Includes 25-foot shielded microphone cable
- Includes foam windscreen
- Attaches to compatible standard microphone stands
- Suitable for horizontal or vertical positioning
- Compatible with Audix Micros Series microphone options
- Requires 18–52V phantom power
- Black finish
- Designed, assembled, and tested by Audix in the USA
Audix MB8455 Microphone Audio Specifications
| Specification | Details |
|---|
| Included Microphone | Audix M1255B |
| Transducer Type | Condenser |
| Diaphragm | 12mm Gold-Vapor |
| Polar Pattern | Cardioid |
| Frequency Response | 50Hz–19kHz |
| Output Impedance | 150 Ohms |
| Sensitivity | 38mV/Pa at 1kHz |
| Equivalent Noise Level | 21dBA |
| Signal-to-Noise Ratio | 73dB |
| Maximum SPL | ≥130dB |
| Dynamic Range | 109dB |
| Power Requirements | 18–52V Phantom Power |
| Microphone Connector | 3-Pin Male Mini-XLR |
Audix MB8455 Boom and System Specifications
| Specification | Details |
|---|
| Manufacturer | Audix |
| Model | MB8455 |
| Series | MicroBoom |
| Product Type | High-Output Carbon Fiber Boom Microphone System |
| Boom Length | 84 Inches / 2134mm |
| Boom Material | Carbon Fiber |
| Boom Diameter | 7.4mm |
| Boom Weight | 111g / Approximately 4oz |
| Gooseneck Material | Flexible Steel |
| Boom Connector — Bottom | Male Mini-XLR |
| Boom Connector — Top | Female Mini-XLR |
| Microphone Length | 54mm / 2.1 Inches |
| Microphone Weight | 16g / 0.56oz |
| Included Cable Length | 25 Feet |
| Cable Type | Shielded Microphone Cable |
| Mounting | Adjustable Clutch Assembly |
| Finish | Black |
| Included Pickup Pattern | Cardioid |
| Microphone Power | 18–52V Phantom |
What's Included in the Audix MB8455?
- 1 × Audix MICROBOOM84 84-Inch Carbon Fiber Boom
- 1 × Audix M1255B High-Output Cardioid Condenser Microphone
- 1 × Adjustable MicroBoom Clutch Assembly with Flexible Gooseneck
- 1 × 25-Foot Shielded Microphone Cable
- 1 × Foam Windscreen
A compatible microphone stand is required and is sold separately.
Audix MB8455 Model Variations
| Model | Included Microphone | Pickup Pattern | Finish |
|---|
| MB8455 | M1255B High Output | Cardioid | Black |
| MB8455W | M1255B High Output | Cardioid | White |
| MB8455HC | M1255BHC High Output | Hypercardioid | Black |
| MB8455WHC | M1255BHC High Output | Hypercardioid | White |
Recommended Applications
Large Choirs and Vocal Ensembles: Provides extended microphone reach for capturing choir sections and group vocals without placing stands directly in front of performers.
Houses of Worship: Offers discreet overhead choir miking for churches, sanctuaries, and worship stages.
Orchestral Section Miking: Allows precise microphone placement above string, woodwind, and other acoustic instrument sections.
Live Theater Productions: Maintains clear sightlines while providing flexible microphone positioning for stage performances.
Concert Halls and Auditoriums: Suitable for ensemble recording and sound reinforcement applications requiring elevated microphone placement.
School and University Music Programs: Provides portable microphone positioning for choirs, orchestras, and performing arts facilities.
Acoustic Ensemble Recording: Captures natural ensemble sound from overhead or extended boom positions.
Location Recording: Offers a lightweight alternative to larger boom assemblies for professional recording setups.
Need a Compatible Microphone Stand or Replacement Cable?
The Audix MB8455 attaches to a compatible standard microphone stand and includes a 25-foot shielded microphone cable.
For reliable positioning, choose a microphone stand with an appropriately stable base and sufficient support for the extended 84-inch boom. Additional counterweight or stabilization may be necessary depending on the mounting arrangement.
The MicroBoom system also supports compatible Audix Micros Series microphones, including the M1255BHC hypercardioid option for applications requiring tighter directional pickup.
The included M1255B condenser microphone requires 18–52V phantom power from a compatible professional mixer, audio interface, or microphone preamplifier.
Why Buy the Audix MB8455 from Audio Supply?
Audio Supply offers professional Audix microphones and accessories for houses of worship, theaters, schools, orchestras, and live sound systems. The Audix MB8455 combines an extended 84-inch carbon fiber boom with a high-output condenser microphone for discreet, flexible distance miking.
