M3 System
Wireless In-Ear Monitor System

M3 System

M3 System
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M3 System

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 gives 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.

  • 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 an ear-conforming foam tip
  • Selectable auxiliary input offers connection point for ambient microphone, click track, or other mic- or line-level input

M3 Components

  • EP3 In-ear dynamic Headphones - In-ear dynamic headphones offer high-fidelity sound and excellent isolation. Including hard case, extension cable, ear tip L/M/S, ear foam and soft pouch.
  • 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


Overall System
Operating Frequencies Band L: 575.000 to 608.000 MHz, 1321 frequencies
Band M: 614.000 to 647.000 MHz, 1321 frequencies
Bande H1: 754.000 to 787.000 MHz, 1321 (nombre de fréquences)

(Not all frequency bands available in all areas. Pl
Minimum Frequency Step 25 kHz
Modulation Mode FM stereo
Maximum Deviation ±40 kHz
Frequency Response 60 Hz to 13 kHz (+/- 3 dB)
Operating Range 100 m (300'), typical
(Open range environment with no interfering signals.)
Dynamic Range 90 dB (typical), A-weighted
Total Harmonic Distortion <1% at (1 kHz, ±20 kHz Deviation)
Operating Temperature Range -5° C (23° F) to +50° C (122° F)
(Battery performance may be reduced at very low temperatures.)
Simultaneous Use 16 channels per band (maximum recommended)
Receiving System Double conversion superheterodyne
Sensitivity 20 dBuV (at 60 dB S/N ratio, 50 ohms termination)
Headphone Output 3.5 mm TRS stereo phone jack, 65 mW (at 32 ohms)
Antenna Input SMA-type, 50 ohms
Dimensions 70.0 mm (2.76") W x 25.0 mm (0.98") D x 110.0 mm (4.33") H
Weight 133g, without batteries
Accessories Included EP3 earphone; flexible antenna
Battery Current/Life 8 hours (alkaline)
Depending on battery type and use pattern
Battery Type 2 x 1.5V AA (not included)
Accessories Included AC adapter (country dependant); rack mount adapters; flexible antenna
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
Headphone Output Connector 6.3 mm (1/4") TRS stereo phone jack
Headphone Output Power 120 mW at 32 ohms
Loop Output Connection XLRM-type connector Pin 1: Ground Pin 2: Hot Pin 3: Cold
Input Connection 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
Net Weight 930g, without accessories
Power Output 10 mW/50 mW (switchable), 50 ohms Limited to 10 mW within 863 MHz to 865 MHz
Following national regulations
Power Requirement 12-18V DC, 600 mA
Spurious Emissions Following national regulations



M3 Declaration of Conformity
M3 License Options
M3 Owners Manual
M3 IEM Brochure