Wireless In-Ear Monitor System

  • 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

    • audio technica M3
  • M3 Overall System Specifications

    Operating Frequencies

    Band H1: 754.000 to 787.000 MHz, 1321 frequencies

    Minimum Frequency Step


    Modulation Mode

    FM stereo

    Normal Deviation


    Dynamic Range (Typical)

    90 dB, A-weighted

    Total Harmonic Distortion

    <1% at (1 kHz, ±20 kHz Deviation)

    Operating Range

    100 m, typical

    Operating Temperature Range

    -5°C ~ 50°C

    Frequency Response

    60 ~ 13,000 Hz (±3dB)

    Simultaneous Use

    16 channels per band (maximum recommended)

    M3R Stereo Receiver

    Receiving System

    Double conversion superheterodyne


    20 dBuV (at 60 dB S/N ratio, 50 ohms termination)

    Headphone Output

    3.5 mm stereo phone jack; 65 mW (at 32 ohms)

    Antenna Input

    SMA-type, 50 ohms

    Input Connections

    3.5 mm TRS stereo phone jack

    Battery Type

    2 x 1.5V AA (not included)

    Battery Current / Life

    8 hours (alkaline)


    70.0mm x 25.0mm x 110.0mm (W x D x H)


    133 g

    Current Consumption

    EP3 earphone; flexible antenna

    M3T Stereo Transmitter

    RF Power Output

    10 mW / 50 mW (switchable), 50 ohms

    Spurious Emissions

    Following federal and national regulations

    Input Connections

    XLRF-type/6.3 mm stereo (1/4\")

    Maximum Input Power


    Output Connector

    XLRF-type/6.3 mm stereo (Loop output)

    Power Supply

    12-18VDC, 600mA

    Headphone Output

    6.3mm stereo phone jack; 120 mW at 32 ohms

    Antenna Input

    BNC, 50 ohms


    210.0mm x 132.0mm x 44.0mm (W x D x H)


    930 g

    Accessories Furnished

    AC adapter; rack mount adapters; flexible antenna


    audio technica support m3-H1.pdf - Operation Manual (Chinese)