The successor to the M2R with improved:
- IP3 performance
- P48 protection on the headphone jack
- Encrypted (256-bit encryption – AES 256-CTR) and non-encrypted operation under one firmware version
- IFB compatibility mode
- Addition of D2 and HDM compatibility modes
- Black anodized finish for low visual profile
The M2Ra Digital IEM Receiver is an improved compact, rugged body-worn stereo digital receiver providing high quality sound for performers or any professionals needing to monitor detailed audio wirelessly. The M2Ra employs advanced antenna diversity switching during digital packet headers for seamless audio. The receiver uses digital modulation and covers 144 or 155 MHz (depending on version) of spectrum in the UHF band.
The M2Ra employs 2-way IR sync, so data from the receiver can be exchanged with DCHT and M2T transmitters. With the M2T, the M2Ra is part of the Duet system which can be managed by Wireless Designer™ Software. This way, frequency planning and coordination can be done quickly and confidently with on-site RF information. Housings and panels are made of machined aluminum with hard-anodized finishes with laser etched marking for durability, yet they are lightweight and sleek in order to be light weight. The M2Ra features a user-friendly interface with a high-resolution, backlit, color LCD and membrane switches. The M2Ra runs for 7 hours on two lithium AA batteries.
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.
| Title | File Size | File Type | Date | Filename | Link |
|---|---|---|---|---|---|
| Firmware for Units Updated with Wireless Designer | 34 MB | zip | June 25, 2026 | wd_v10Jun2026.zip |
M2Ra Firmware History
WD Firmware Update v15May2025
M2Ra v1.18 (SUPER)/v1.04 (FPGA, H/W v0-0)/v2.03 (FPGA, H/W v1-0)
- The M2RA now initiates a clean shutdown when batteries are running very low. When this happens, the message “Powering off…” appears on the LCD until the batteries are removed or the receiver is switched off.
- Flexlist entries with compatibility modes set to D2 or HDM now retain those values when power is cycled.
- The default frequency for band B1C1 is now 545 MHz, which is compatible with all Locale settings.
- Added band B1+ as a smart tune frequency range choice in band B1C1 when the Locale is set to “NA”. When B1+ is selected, frequencies 614.050 through 614.375 MHz are available. These are “guard band” frequencies authorized in the US and Canada.
- Corrected tuning range in M2RA-B1C1 when Locale is set to “NA” to include missing guard band frequencies 614.050 MHz to 614.375 MHz.
WD Firmware Update v06Nov2024
M2Ra v1.16 (SUPER)/v1.04 (FPGA, H/W v0-0)/v2.03 (FPGA, H/W v1-0)
- 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 title of the “Battery Warning” page has been changed to “Battery Alert”, the name of the menu option which opens it.
WD Firmware Update v26Jul2024
M2Ra v1.15 (SUPER)/v1.04 (FPGA, H/W v0-0)/v2.03 (FPGA, H/W v1-0)
- On the main page, the compatibility mode is now displayed between the two diversity indicators.
- A new “Edit Name” page allows the receiver name to be edited using the front panel user interface. In the Settings menu, choose “Edit Name” to open the page. The current receiver name will be displayed. If the length of the name is less than the maximum of 16 characters, an “end” marker (“>>”) will be displayed.
- The currently selected character in the name is indicated by the block cursor. Press MENU to move the cursor. When the cursor reaches the end of the name, it wraps around to the beginning.
- To change a character, press MENU to move the cursor to the desired location. Press the UP or DOWN buttons to change the
character. HINT: when cycling through the available characters with the UP and DOWN arrow keys, moving down from ‘A’ or up from
‘@’ truncates the string at that point and the selected character is replaced by the end marker (“>>”). Press the UP or DOWN key
again to restore the name and continue scrolling through the list of available characters. - To change the case of an alphabetic character, press the MENU+UP key combination to toggle between uppercase and lowercase.
– To append a character when the length of the name is less than 16, press MENU to advance the cursor to the “>>” end marker.
Then press the UP or DOWN buttons to change the end marker to the desired character. The end marker will shift to the right
if the length of the name is still less than 16 characters. - To truncate the name at any point, press MENU to move the cursor to the desired location and press the MENU+BACK button combination.
The selected character will be replaced by the “>>” end marker.
- On the main page, press the BACK button to alternate between two
top-of-page display options:- Receiver name on 1st line in large font, frequency on 2nd line in small font.
- Receiver name on 1st line in small font, frequency on 2nd line in large font.
The receiver name font settings persist through power cycles.
- D2 compatibility mode updated to improve reception of weak or distorted signals.
WD Firmware Update v12May2024
M2Ra v1.14 (SUPER)/v1.03 (FPGA, H/W v0-0)/v2.02 (FPGA, H/W v1-0)
- The LEDs Off feature now includes an “Always Off” option, and the “Off” option no longer persists and will default to “On” when powering up the device.
- Fixed a bug where, when sending a flexlist, the device would always report that there was an error. Also, whenever there was a reported IR error, it would always display the sync error message.
WD Firmware Update v19Apr2024
M2Ra v1.13 (SUPER)/v1.03 (FPGA, H/W v0-0)/v2.02 (FPGA, H/W v1-0)
- FlexList profiles now include a compatibility mode setting. This allows entries in the list to have differing compatibility modes.
- Eliminated noise bursts heard when scrolling through flexlist profiles.
- Made it possible for FlexList entries to use the D2 or HDM compatibility modes, in case transmitters with FlexList capability support those modes in the future.
WD Firmware Update v16Oct2023
M2Ra v1.10 (SUPER)/v1.02 (FPGA, H/W v0-0)/v2.01 (FPGA, H/W v1-0)
- SmartTune feature now only suggests frequencies that are in range for the currently selected locale.
- Fixed popping sound heard when changing compatibility mode.
WD Firmware Update v14Jun2023
M2Ra v1.08 (SUPER)/v1.02 (FPGA, H/W v0-0)/v2.01 (FPGA, H/W v1-0)
- Added support for frequency band B1C1.
- FlexLists may now contain frequencies which are outside of the receiver’s frequency coverage. If so, such entries appear “grayed out” in the Listen menu.
- SmartTune now prompts for a frequency band to be selected before scanning.
- Scan data is now preserved when the receiver is powered off.
- When scanning, the receiver is no longer automatically tuned.
- The info screen at startup now shows the device’s frequency band.
WD Firmware Update v02Feb2023
M2Ra v1.02 (SUPER)/v1.02 (FPGA, H/W v0-0)
- Made changes to increase efficiency of factory testing process. No new features.
WD Firmware Update v06Dec2022
M2Ra v1.01 (SUPER)/v1.01 (FPGA, H/W v0-0)
- Added D2 and HDM compatibility modes.
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.
WD Firmware Update v09Sep2019
M2R-X v3.02 (SUPER)/v3.01 (FPGA)
- Initial release of alternate firmware load supporting AES-256 encrypted transmission.
WD Firmware Update v09Sep2019
M2R-X v3.02 (SUPER)/v3.01 (FPGA)
- Initial release of alternate firmware load supporting AES-256 encrypted transmission.
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