Audix M1255BO - Omnidirectional Miniaturized Condenser Microphone (Black)
The Audix M1255BO represents the pinnacle of acoustic miniaturization engineering, offering a virtually invisible professional audio solution without sacrificing sound quality. This condenser microphone, part of the acclaimed Micros™ series, is distinguished by its omnidirectional capsule and fully integrated preamp, an innovative feature that eliminates the need for bulky external power modules. Meticulously designed in the USA, the M1255BO combines a machined brass chassis just 54 mm long with low-noise electronics, making it the preferred choice for fixed installations, broadcast studios, and live sound reinforcement where aesthetics are as crucial as performance.
Unlike conventional microphones, the M1255BO is optimized with extremely high sensitivity (40 mV), allowing it to capture distant sound sources with crystal clarity. Its radio frequency (RF) interference immunity technology ensures a clean signal, free from unwanted noise generated by GSM devices, mobile phones, and wireless networks—an essential requirement in today's corporate and conference environments. Thanks to its omnidirectional polar pattern, this model captures sound evenly from all directions (360 degrees), providing a natural and open response, ideal for capturing the ambience of a room or groups of people without the "proximity effect" that colors the bass in other microphones.
Main features
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Miniaturized Design with Integrated Preamplifier: By housing the preamplifier within the microphone body itself, a cleaner installation is facilitated and heavy external adapters at the end of the cable are avoided.
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Total RF Immunity: Equipped with advanced shielding to prevent interference from mobile devices and GSM, ensuring flawless audio transmission in signal-saturated environments.
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High Definition Omnidirectional Capsule: Offers a flat and extended frequency response (50 Hz - 19 kHz), capturing sound naturally and transparently from any angle.
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High Sensitivity for Remote Pickup: Specifically designed to capture clear audio even when the sound source is far from the microphone, such as on ceilings or in choirs.
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Vaporized Gold Diaphragm: Features a 12mm diaphragm that ensures a fast and accurate transient response.
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Robust and Elegant Construction: Made from machined brass with a durable matte black finish, combining strength with visual discretion.
Benefits for the professional user
For installation engineers and systems integrators, the Audix M1255BO solves the challenge of miking large spaces without visually cluttering the environment. Its ability to capture sound evenly allows for fewer microphones to cover the same area, simplifying mixing and channel management. The absence of proximity effect (the increase in bass when moving closer to the source) allows for flexible placement without altering the natural timbre of the voice or instrument.
Furthermore, the detachable cable system with a Mini-XLR connector simplifies maintenance and installation through narrow ducts or suspended ceilings. The inclusion of various mounting accessories ensures the microphone can be adapted to stands, ceilings, or suspension clips right out of the box.
Ideal use cases
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Conference and Meeting Rooms: Installation on tables or ceilings to capture all participants around an area without the need for a microphone for each person.
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Choir and Vocal Group Capture: Suspended from the ceiling (overhead), its omnidirectional pattern blends voices homogeneously, creating a cohesive ensemble sound.
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Room Recording: Ideal for capturing the natural acoustics of a concert hall, auditorium, or recording studio to add depth to the mix.
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Scientific and Medical Microphones: Its flat, omnidirectional response is perfect for documenting procedures where faithful capture of the entire sound environment is required.
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Theater and Stage: As a zone or ambient microphone to capture the audience's reaction or general stage sounds.
Frequently Asked Questions
Does the M1255BO require phantom power?
Yes, the microphone requires a standard 18-52 volt phantom power supply to operate its built-in preamp.
What is the difference between the M1255B and M1255BO models?
The M1255B series is the base model, but the final letters indicate the polar pattern. The standard "B" is usually cardioid, while "BO" specifies that this model has an omnidirectional capsule (360-degree pickup).
Can it be hung from the ceiling?
Absolutely. The package includes the MCHANGER clip, specifically designed to adjust the microphone angle when suspended from the cable—ideal for choirs or conferences.
Is the cable fixed or detachable?
The cable is detachable. A 25-foot (approx. 7.6-meter) cable with Mini-XLR female to standard XLR male connectors is included.
Project description
A 54 mm miniaturized condenser microphone with a fully integrated preamplifier and omnidirectional polar pattern. The device must offer complete immunity to radio frequency (RF) and GSM interference. It will operate on 18-52 V phantom power. Required technical specifications: frequency response of 50 Hz to 19 kHz, output impedance of 150 ohms, sensitivity of 40 mV/Pa @ 1kΩ, and a maximum sound pressure level (SPL) of ≥130 dB. The body will be machined brass with a black finish and will include a 7.6-meter detachable mini-XLR to XLR cable, mounting clip, hanging clip, and windscreen.
