M40 Series

Miniature High Output Ceiling Microphone

The M40 is a miniaturized condenser microphone with a fully integrated preamp designed with very high sensitivity for distance miking. The primary applications for the ceiling-mounted M40 include Video & Teleconferencing (VTC), distance learning, hospital rooms, surveillance, and ambient room miking.

The M40 ceiling microphone has complete immunity from RF interference caused by cell phones and GSM devices. The M40, which comes with a cardioid capsule, is also available with hypercardioid or shotgun capsules, allowing for the microphone to be used in a wide variety of applications.

The M40 installed ceiling microphone is easy to install requiring only that a 5/8 inch hole be drilled in the ceiling with no additional tools required. The cable assembly is equipped with a terminal block connector. For installations where a plenum-rated cable is to be used, a UL-rated metal plenum junction box is available.

Designed, machined, assembled, and tested by Audix in the USA.

Note: The M40 Series comes in a variety of model options. Please see below.

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Transducer Type Condenser
Frequency Response 60 Hz – 10 kHz
Polar Pattern Cardioid, Hypercardioid, Shotgun
Output Impedance 150 ohms
Sensitivity 37 mV / Pa @ 1k
Signal/Noise Ratio (A-weighted) 72 dB
Equivalent Noise Level (A-weighted) 22 dB
Maximum SPL @ .5% THD ≥130 dB
Dynamic Range 108 dB
Power Requirements 18 – 52 V Phantom
Connector Terminal Block Connector
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3
Materials / Finish Copper and Steel Powder Coat
Weight 0.7 oz / 20 g
Length 2.1 in / 54 mm
Download Spec Sheet

1x M40 Miniature Ceiling Microphone
1x CONN170F 1′ Integrated Microphone Cable
1x CONN170M The Mating Terminal Connector

  • M40W6 – Hanging integrated cardioid ceiling microphone with 6″ gooseneck. 12″ cable terminating into phoenix connector. Includes mating phoenix connector. Requires 18 – 52 V phantom power. White.
  • M40W12 – As above with 12″ gooseneck. White.
  • M40W6HC – As above with 6″ gooseneck, with hypercardioid capsule. White.
  • M40W6S – As above with 6″ gooseneck, with shotgun capsule. White.
  • M40W12HC – As above with 12″ gooseneck, with hypercardioid capsule. White.
  • M40W12S – As above with 12″ gooseneck, with shotgun capsule. White.


*Manufactured under licence
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