AUDIO TECHNICA M3 Wireless In-Ear Monitor System


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.

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    • 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 mixes 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 the 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 the 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 ear tips plus ear-conforming foam tips


  • Selectable auxiliary input offers connection point for ambient microphone, click track, or other mics or line-level input
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 Output 10 mW/50 mW (switchable), 50 ohms
Limited to 10 mW within 863 MHz to 865 MHz
Following national regulations
Spurious Emissions Following federal and national regulations
Input Connections XLRF-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 Level XLRF-type/6.3 mm stereo, (1/4″) balanced: +26 dBu
6.3 mm (1/4″) mono, unbalanced: +26 dBu
Loop Output Connector XLRM-type connector
Pin 1: Ground
Pin 2: Hot
Pin 3: Cold
Power Requirement 12-18V DC, 600 mA
Headphone Output Connector 6.3 mm (1/4″) TRS stereo phone jack
Headphone Output Power 120 mW at 32 ohms
Antenna Connector BNC, 50 ohms
Dimensions 210.0 mm (8.30″) W x
132.0 mm (5.20″) D x
44.0 mm (1.70″) H
Net Weight 930 g (32.8 oz), without accessories
Accessories Included AC 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 the 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


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