Description

The M2R Digital IEM Receiver is a compact, rugged body-worn unit providing studio-grade sound quality for performers or any professionals needing to monitor
detailed audio wirelessly. The M2R employs advanced antenna diversity switching during digital packet headers for seamless audio. The receiver covers UHF frequencies from 470.100 to 614.375 MHz and uses digital modulation. The 24-bit digital audio stream guarantees high resolution sound quality with wide
dynamic range, low noise floor, and solid stereo image.

Accessories

Documentation

Data Sheet

M2R DATA SHEET

Manual

M2R MANUAL

Firmware

Below is a link to the current firmware update file for the Duet System – M2T transmitter and M2R receiver, plus the DCHT portable transmitter. This is a zip file, after downloading extract it into a temporary folder. Use the Wireless Designer™ program to update firmware, instructions are found here.

Note: This is a link to the Wireless Designer firmware update file, which bundles the latest firmware for multiple products. Wireless Designer will automatically choose the right firmware images from the file.

In the past, there were two firmware choices offering either unencrypted digital transmission (“DUET” mode) or AES-256 encrypted digital transmission (“DCHX” mode). The original unencrypted mode firmware was the version 2.x series, and the new encrypted mode firmware was the version 3.x series. If encrypted mode firmware is installed into M2T or M2R units, they are identified in Wireless Designer as M2T-X and M2R-X to indicate that they are operating in encrypted transmission mode.

This has changed! Now both encrypted and unencrypted modes are contained in a single firmware load starting with M2T version 4.0.01. In this version, a new compatibility mode setting exists with two options, “DCHX” (encrypted) and “DUET” (unencrypted). Both compatibility modes are already available in the M2RA. Note: With M2T version 4.0.01 firmware installed, Wireless Designer version 2.1.01 or higher is required.

CLICK HERE FOR M2R FIRMWARE HISTORY

CLICK HERE FOR M2R-X FIRMWARE HISTORY

Title	File Size	File Type	Date	Filename	Link
Firmware for Units Updated with Wireless Designer	34 MB	zip	June 25, 2026	wd_v10Jun2026.zip	Download

Firmware History

M2R Firmware History

CLICK HERE FOR M2R FIRMWARE FILES FOR DOWNLOAD

WD Firmware Update v06Nov2024

M2R v2.10 (SUPER)/v2.10 (FPGA)

If Battery Type is “Rechargable”, the battery status indicator on the main page now reports “FULL”, “OK” or “LOW” instead of a percentage of charge.
The M2R now fully conforms to Lectrosonics’s 2-way IR Universal Sync Protocol.

WD Firmware Update v20May2021

M2R v2.09 (SUPER)/v2.10 (FPGA)

Change battery type label from “Alkaline” to “Rechargable” on battery type menu page (Use of Alkaline batteries not recommended for M2R).
Always use IEM compatibility mode when listening to flexlist profile.
When viewing profile details by pressing MENU+UP on the “FlexList Listen” page, force use of the profile settings instead of the main settings.
Now, pressing MENU in the “FlexList Listen” page opens a new page named “Copy Profile”. Here the user can copy the settings from the currently selected profile to the main settings.
Fix bug sometimes causing garbled audio at power-on caused by incomplete internal reset.
Fix low audio meter readings in IFB compatibility mode.

WD Firmware Update v01Mar2021

M2R v2.08 (SUPER)/v2.09 (FPGA)

Fixed a IFB mode bug introduced in FPGA v2.08 where receiver fails to squelch when pilot tone is dropped.

WD Firmware Update v09Aug2020

M2R v2.08 (SUPER)/v2.08 (FPGA)

Added lock/unlock keypad shortcut (hold UP+DOWN to lock/unlock).
Added JA locale.
Added always-on transparent NR algorithm for improved audio quality.

WD Firmware Update v24Jan2020

M2R v2.07 (SUPER)/v2.06 (FPGA)

Fixed bug wherein digital signal might not be acquired correctly (RF meter remaining white or audio being garbled) if carrier is already present when receiver is switched on.

WD Firmware Update v18Dec2019

M2R v2.07 (SUPER)/v2.05 (FPGA)

Added “Share List” command to FlexList menu. This allows wholesale transfer of the FlexList from one M2R to another via the IR link. To receive the shared FlexList, the recipient M2R need only be powered on and within IR range.

WD Firmware Update v05Nov2019

M2R v2.06 (SUPER)/v2.05 (FPGA)

Added AU locale to support use with new model M2T/E06 for Australia.
Added shortcut to Flexlist Listen page (BACK+UP from main page or from main menu).

WD Firmware Update v26Nov2018

M2R v2.05 (SUPER)/v2.05 (FPGA)

Fixed bug in diversity receive system which caused it to be inoperative or to underperform.

WD Firmware Update v08Nov2018

M2R v2.05 (SUPER)/v2.04 (FPGA)

Switched to new high-resolution audio format which delivers superior performance. This new format is NOT compatible with the original Duet format. If this version is used, all components of the Duet system, M2T and M2R, must be upgraded for interoperability. Alternatively, newer components may be downgraded to v1.x firmware for use with older components if desired.
The audio output limiter has two new pregain settings, -3 and -6, for quieter output when required.
The audio output limiter settings page now has a gain reduction meter.
The audio output limiter can now be switched off altogether if desired.
Audio meters have been rescaled, placing zero at the top of the scale. Also, the indicators now turn yellow at -6 dBFS instead of -20 dBFS.
Indicator LEDs can now be turned off. On the main screen, the UP and DOWN arrow buttons can be used to do this.
The volume control taper is now selectable: log (default) or linear.
The master volume control can now be locked. An indicator of volume lock status now appears on the main screen.
A bug which caused poor RF performance in FlexList Listen mode in certain cases has been fixed.
Correct reversed audio polarity in headphone output.

WD Firmware Update v23Aug2018

M2R v1.12 (SUPER)/v1.12 (FPGA)

Fixed bug which sometimes caused poor RF sensitivity in FlexList “Listen” mode.
Corrected reversed polarity of audio output.

WD Firmware Update v20Feb2018

M2R v1.11 (SUPER)/v1.11 (FPGA)

Added “Earphone Type” selection. When “Mono” is chosen, a mono (tip/sleeve) headphone plug may be used without shortening the battery life. Select “Stereo” when using a stereo (tip/ring/sleeve) headphone plug.

WD Firmware Update v25Jan2018

M2R v1.10 (SUPER)/v1.11 (FPGA)

Added, frequency, numerical volume setting and mix mode indicators to the main display page.
Added SmartTune feature.
Further improvements to squelch operation to prevent loud drop-outs.
Doubled the scanning speed.

WD Firmware Update v13Dec2017

M2R v1.03 (SUPER)/v1.06 (FPGA)

Apply log taper to volume control for finer resolution at low levels.
Improved squelch operation to prevent loud drop-outs.

WD Firmware Update v16Nov2017

M2R v1.03 (SUPER)/v1.02 (FPGA)

Fix bug causing erasure of the unit’s serial number when the “set to factory defaults” feature was invoked.

WD Firmware Update v25Oct2017

M2R v1.02 (SUPER)/v1.01 (FPGA)

Further improvement of RF meter accuracy.
Change default frequency to 512 MHz to match M2T.

WD Firmware Update v12Oct2017

M2R v1.01 (SUPER)/v1.01 (FPGA)

Improved accuracy of battery “percentage remaining” reporting.
Improved accuracy of RF signal strength metering on both main screen and in scan function.

M2R-X Firmware History

Firmware History: M2R-X

WD Firmware Update v06Dec2024

M2R-X v3.07 (SUPER)/v3.05 (FPGA)

If Battery Type is “Rechargable”, the battery status indicator on the main page now reports “FULL”, “OK” or “LOW” instead of a percentage of charge.

WD Firmware Update v19Jul2022

M2R-X v3.06 (SUPER)/v3.05 (FPGA)

Change battery type label from “Alkaline” to “Rechargable” on battery type menu page (Use of Alkaline batteries not recommended for M2R-X).
Fix bug sometimes causing garbled audio at power-on caused by incomplete internal reset.

WD Firmware Update v09Aug2020

M2R-X v3.05 (SUPER)/v3.04 (FPGA)

Added lock/unlock keypad shortcut (hold UP+DOWN to lock/unlock).
Blue LED now blinks when received signal is valid but encryption key is bad (no key at TX or RX, or key is mismatched).
Added JA locale.
Added always-on transparent NR algorithm for improved audio quality.

WD Firmware Update v16Dec2019

M2R-X v3.04 (SUPER)/v3.02 (FPGA)

Fixed erroneous “key mismatch” report on first upgrade from M2R (v2.x) to M2R-X firmware (v3.x).
Fixed bug wherein digital signal might not be acquired correctly (RF meter remaining white or audio being garbled) if carrier is already present when receiver is switched on.

WD Firmware Update v11Oct2019

M2R-X v3.03 (SUPER)/v3.01 (FPGA)

Changed internal representations of key types so that the default key type (Universal) will be automatically selected upon update from 2.x firmware to 3.x firmware.
Changed “Share Key” page title and menu label to “Send Key”.
Added AU locale to support use with new model M2T/E06 for Australia.