Audio-Technica Menu


Wireless In-Ear Monitor System

U.S. Two-Year Limited End-User Warranty

*Manufacturer's Suggested Retail Price. Actual selling price may vary; please check with an authorized Audio-Technica dealer.

  • Overview
  • Features
  • Configurations
  • Specifications
  • Downloads
  • Reviews
  • Q & A

  • Overview

    Audio-Technica’s advanced M3 IEM system offers a full range of professional in-ear monitoring features, with a choice of 1321 UHF channels and easy-to-read LCD information displays on both transmitter and receiver for setting preferences. The stereo monitor system is equipped with Audio-Technica’s versatile Personal Mix Control, which allows volume and mix control of two independent signals on stage, via controls on the M3R stereo body-pack receiver. While up to 16 complete M3 systems may be used simultaneously, any number of M3R stereo receivers can operate on the same frequency with a single M3T stereo transmitter. The M3T Stereo Transmitter is equipped with two XLR/¼” combo input connectors into which users can connect line-level inputs (from a mixing console, for example). The M3T also offers a headphone output that allows you to monitor transmitter input signals directly.
  • Features

    • High-fidelity sound with clean, articulate mix allows performers to hear themselves clearly at lower volume

    • 1321 selectable UHF channels with automatic frequency scanning

    • Up to 16 simultaneous systems per frequency band

    • Three receiver modes: Personal Mix, stereo, and mono

    • Personal Mix Control allows volume and mix control of two independent signals at the receiver

    • LCD information display offers step-through menus for setting preferences

    • XLR loop output (true pass-through) connects signal to mixing console, additional IEM system or recording device with no signal degradation

    • Adjustable squelch eliminates annoying static

    • Pilot tone protects against RF interference when transmitter is turned off

    • Multi-level limiter (defeatable) helps protect hearing from sudden peaks

    • Portable system is quick to load and set up

    • Reduces on-stage audio clutter for better overall mix & less feedback

    • Use any number of Stereo Receivers (with individual mixes) on the same frequency

    • Audio-Technica earphones with proprietary dynamic drivers offer full frequency response and outstanding isolation

    • Personal fit with 3 sizes of rubber eartips plus ear-conforming foam tips

    • Selectable auxiliary input offers connection point for ambient microphone, click track, or other mic- or line-level input

    M3 Components
    EP3 Headphones
    In-ear dynamic headphones offer high-fidelity sound and excellent isolation
    M3T Stereo Transmitter
    Wireless UHF transmitter (frequency-agile) offers LCD display and 1321 user-selectable frequencies
    M3R Stereo Receiver
    Personal Mix Control in a lightweight body-pack with backlit LCD display

    M3 Optional Accessories
    AM3 Omnidirectional Condenser Lavalier Microphone
    ATW-A49S Antenna
    MCB4 Antenna Combiner
    AT8623 Joining Plate
    EP1 In-ear Headphones

    Compare the M2 & M3 Wireless In-Ear Monitor Systems.

    Why choose in-ear monitors?
  • Configurations

    Wireless M3T stereo transmitter with headphone output, M3R stereo receiver with 3.5 mm line-in jack and EP3 in-ear dynamic headphones with 3 sizes of rubber earpieces plus ear-conforming foam tips.
    Body-pack stereo receiver for use with Audio-Technica M3L and M3M Wireless In-ear Monitor Systems. Includes EP3 in-ear dynamic headphones, extension cable/adapter with 3.5 mm connector, interchangeable earpieces (Small, Medium & Large), ear-conforming foam tips, soft pouch.
    Stereo transmitter for use with Audio-Technica M3L and M3M Wireless In-ear Monitor Systems. Equipped with two XLR/¼" combo input connectors and headphone output. Includes AC adapter (country dependent), rack mount adapters, and flexible antenna.
  • Specifications

    Operating Frequencies Band L: 575.000 to 608.000 MHz, 1321 frequencies

    Band M: 614.000 to 647.000 MHz, 1321 frequencies DISCONTINUED IN NORTH AMERICA

    Not all frequency bands available in all areas. Please check with local regulations.
    Minimum Frequency Step 25 kHz
    Modulation Mode FM stereo
    Maximum Deviation ±40 kHz
    Dynamic Range 90 dB (typical), A-weighted
    Total Harmonic Distortion <1% at (1 kHz, ±20 kHz Deviation)
    Operating Range 100 m (300'), typical
    (Open range environment with no interfering signals.)
    Operating Temperature Range -5° C (23° F) to +50° C (122° F)
    (Battery performance may be reduced at very low temperatures.)
    Frequency Response 60 Hz to 13 kHz (+/- 3 dB)
    Simultaneous Use 16 channels per band (maximum recommended)
    For assistance with multi-band operation or other frequency coordination issues, please contact you regional Audio-Technica customer service representative.

    Receiving System Double conversion superheterodyne
    RF Sensitivity 20 dBuV (at 60 dB S/N ratio, 50 ohms termination)
    Headphone Output Connector 3.5 mm TRS stereo phone jack
    Headphone Output Power 65 mW (at 32 ohms)
    Antenna Input SMA-type, 50 ohms
    Aux Input Connector 3.5 mm TRS stereo phone jack
    Batteries 2 x 1.5V AA (not included)
    Battery Life 8 hours (alkaline)
    Depending on battery type and use pattern
    Dimensions 70.0 mm (2.76") W x
    25.0 mm (0.98") D x
    110.0 mm (4.33") H
    Net Weight 133 g (4.7 oz), without batteries
    Accessories Included EP3 earphone; flexible antenna

    RF Power Output10 mW/50 mW (switchable), 50 ohms
    Limited to 10 mW within 863 MHz to 865 MHz
    Following national regulations
    Spurious EmissionsFollowing federal and national regulations
    Input ConnectionsXLRF-type/6.3 mm stereo (1/4") combination connector
    Pin 1 and Sleeve: Ground
    Pin 2 and Tip: Hot
    Pin 3 and Ring: Cold
    Maximum Input LevelXLRF-type/6.3 mm stereo, (1/4") balanced: +26 dBu
    6.3 mm (1/4") mono, unbalanced: +26 dBu
    Loop Output ConnectorXLRM-type connector
    Pin 1: Ground
    Pin 2: Hot
    Pin 3: Cold
    Power Requirement12-18V DC, 600 mA
    Headphone Output Connector6.3 mm (1/4") TRS stereo phone jack
    Headphone Output Power120 mW at 32 ohms
    Antenna ConnectorBNC, 50 ohms
    Dimensions210.0 mm (8.30") W x
    132.0 mm (5.20") D x
    44.0 mm (1.70") H
    Net Weight930 g (32.8 oz), without accessories
    Accessories IncludedAC adapter (country dependant); rack mount adapters; flexible antenna

    Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone website at

  • Downloads

    M3 Wireless In-Ear Monitor System Manual (pdf 2.54 M)
    M3 System Submittal Sheet (pdf 159.51 KB)
    Wireless Mics & Cables
    Wireless System Accessories
    Using Wireless
  • Reviews

    Product has good clear audio.very easy to use. Definatly wou


    Background professional drummer and I have gone through a variety of vocal stand and floor monitors and have found the m3t has proven to be more reliable. The sound quality and range are very good. The monitor is very easy to set up.

    Jersey shore

    Great deal, well under a G Note


    I got these from a local dealer hoping that I wouldn't have to pony up for a set of Shure's and so that I wouldn't add to the noise confusion that was occurring already (someone else wanted to add another floor monitor). I found it excessively easy to set up and start using, got my mix set up and shoot vocals to one side and instruments to the other. I have yet to get a set of custom molds, but the included ear tips seem to work just fine at blocking out the ambient noise and allow me to focus on my singing and playing. The unit has more options than I really need, which is weird because I LOVE bells & whistles.

    Rome, NY, USA

    Reliable and always ready!


    We have used the M3 systems for 4 years now on the road and like them very much. We do not use the supplied ear buds though. We bought Westone ones which we liked better. The four star rating is for the body pack. It's large and bulky and it's really hard to get the batteries in and out of them. They use up batteries a bit faster than your wireless instrument or vocal pack but still go for a good 3-4 hours with rechargeables depending on the outside temp. Over all they are great, rugged and trustworthy systems.

    Loudonville, OH, USA

    M3 Wireless In-Ear Monitor System

    4.3 3


  • Q & A

    I'm not receiving any signal through my receiver. It keeps flashing "unlock" on the receiver display. I have never seen this before in the four years I've had this product. Please help.


    Please contact our Audio Solutions Department at (330) 686-2600 ext 5000 or at for assistance with this.


    I have been using a set of M3 receivers for about 7 years. A few are starting to have some issues, like cutting out and in randomly. Is it possible to have them refurbished?


    Thank you for your inquiry. This sounds like you may be experiencing RF interference from something. Please contact our Audio Solutions Team at 330-686-2600 ext. 5000. They would be happy to help you.


    Is there a way where I can buy just the antenna's for the M3R UHF Stereo Receiver?


    Thank you for your inquiry. You may contact our Parts Department at or call (330) 686-2600 ext 5002. to inquire about a replacement if you are located in the US.

    What is the difference between frequ band L and M?


    Thank you for your inquiry. The L Band operates in the 575.000 to 608.000 MHz frequency band. The M band operates in the 614.000 to 647.000 MHz frequency band. You will want to make sure the location these are being used in do not have TV channels being used in the same band as your In-ear monitor system, or you will get wireless interference. For assistance in selecting the right frequency band for you in your area, please contact our Audio-Solutions Department at (330)686-2600 ext 5000. or email at


    Hi I just bought the m3 wireless IEM System. I am wondering if the rear antenna will work ok mounted in my rack. The rack is a Gator, Polyethylene materiel I believe. The only metal I believe is the locks and the rack holes. If it may be a problem is there a kit for the m3 to front mount the antenna? Thanks

    Jim Byrd

    Please contact our Audio Solutions Department at (330) 686-2600 ext 5000 or at for assistance with this.


    "Use any number of Stereo Receivers (with individual mixes) on the same frequency" Does that mean I can send 10 individual ques to 10 receiving packs using 1 transmiter?


    You are sending a single mix from your mixer to the M3 transmitter. This may be picked up by any number of receivers. (Just like a radio station.) The number of individual mixes you want, you will need that number of transmitters.


    Can you use multiple receivers/body packs with one transmitter?


    Yes, just like a radio station; the transmitter is sending out a signal and any number of receivers can pick up that signal.


    Is it possible to use the M2R receivers with the M3 transmitter?


    No, the two systems have different pilot tones.


    What size screw is used to mount the rack "ears" to the M3 transmitter body sides. There are three holes on each side and while the unit came with the ears, there did not seem to be any screws included.


    Thank you for your inquiry. The size is M3 X 6.


    I have 5 M3T systems. How many aux sends does my Mixer need to give each person personal stereo mix? Do you have diagrams showing how to connect everything? I want to put them in a rack also and carry the rack to different venues and connect to the venues board to avoid having to use floor monitors and the low rent places my group plays. We never got a good monitor mix


    To receive the best possible answer to your question, please contact the Audio-Technica United States (ATUS) Audio Solutions Team at: Thanks!