TM400 Compact


Wireless System For Test And Measurement

Models: HMa, LR (Not Available in Europe)

*System does not include microphone

  • Replaces long cable between calibrated microphone and test equipment

  • 24-bit, 88.2 kHz digital signal handling for compandor-free audio

  • Over 3,000 UHF frequencies for wide choice of tunings to avoid interference

  • Rugged all-metal construction


  • Battery operated, or external DC with optional accessory
  • Low noise, robust RF front end

  • Balanced mini XLR audio output

  • SmartTuning™ with graphic display for easy selection of clear RF frequencies


  • Converts microphones with XLR jacks to wireless operation
  • Selectable 5, 18, 48 Volt powering
  • 50 or 100 mW RF output power (50 mW only for EU version) for long range
  • Membrane switch control panel with LCD display

The TM400 system was designed to provide the ideal link between calibrated test microphones and measurement equipment such as SIM®, SIA SMAART Live®, TEF® or other systems. By using a radio link, long cables can be eliminated thus saving time and providing opportunities for additional measurements to increase accuracy. The microphone can even be moved around in the venue while the audience is present – something that is impossible with a cabled measurement microphone.

Lectrosonics Digital Hybrid Wireless™ (U.S. Patent Pending) uses a proprietary algorithm to encode the digital audio information into an analog format which can be transmitted in a robust manner over an analog FM wireless link. This combination offers the superb audio quality of a pure digital system and the outstanding operating range of the finest FM wireless systems. The digital audio chain eliminates compandor artifacts, and provides audio frequency response flat to 20 kHz. The RF link takes advantage of the spectral efficiency characteristics of an aggressively optimized FM radio system.

This digital/analog hybrid technique has some very beneficial properties. Because the information being transmitted is digitally encoded, useable dynamic range is much higher than a compandor can offer and there is no compandor in the audio signal to interfere with your measurements.

The TM400 Compact system comes standard with the HMa transmitter, LR receiver, TA3 to XLR cable adapter, and CCTM400 water-resistant case. However, the components can also be ordered separately.


Included Accessories


    • 2 - AA Alkaline Batteries
    • 1 - HM Pouch (Part #PHTRAN3)
    • 1 - Quickstart Guide


    • 1 - Power Supply (Part #DCR12/A4U)
    • 2 - Antennas (Part #A500RAXX)
    • 4 - Rubber Feet (Part #35664)
    • 1 - MCA-M30
    • 1 - Manual

Awards & Reviews


January 2008: Product Of The Month

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