Digital Wireless Transmitter

 User Guide

Compact Digital Transmitter with Built-in Timecode-Enabled Recorder

The A10-TX transmitter is the heart of the A10 Digital Wireless System. And the core of the A10-TX transmitter is its low-noise, high-dynamic-range analog input. It accepting signals from low-level lavalier microphones to balanced line-level. The 3-pin LEMO input offers analogue limiters, 5 volt bias for lavalier microphones, as well as 12 and 48 volt phantom power for balanced microphones.

A timecode-enabled recorder is integrated into the A10-TX. It records timecode-stamped files to removable microSD cards. After recording the proprietary .mic file requires conversion to WAV file using Mic2Wav utility software for macOS and Windows.

Low-noise, studio-grade balanced input for microphones and line level inputs with analogue limiter and 48 V phantom power

Integrated digital recorder with ultra-accurate timecode generator

Records to removable microSD cards

Simultaneous wireless transmission and recording

Remote controllable over Bluetooth® using the A10 Remote app for Android and iOS

Available in four blocks


A10-TX-A 470 – 548 MHz
A10-TX-B 518 – 608 MHz
A10-TX-C 594 – 694 MHz
A10-TX-D 534 – 630 MHz


Built-In Audio Recorder

The A10-TX transmitter includes an integrated high-quality digital recorder. Sources connected to the A10-TX can be recorded to removable FAT32 formatted microSD cards. Files are recorded to Audio Ltd’s proprietary, data-compressed “.mic” file format. These .mic files incorporate timecode from the A10-TX timecode generator.

Audio Ltd’s Mac OS and Windows software utility Mic2Wav converts .mic files into monophonic, 24-bit, 48 kHz broadcast WAV files with its associated timecode.

A10-TX Accessories


XLR female to 3-pin LEMO cable – 40.6 cm, used to connect balanced microphones to the A10-TX.

A10 Remote App

The available iOS and Android app offers wireless remote control of the A10-TX and A10-TX-US transmitter.


Boom pole mount for the A10-TX Transmitter. Mounts to the top of a boom pole.


Belt Clip for A10-TX Transmitter (included with A10-TX)


5-PIN LEMO to 3-PIN LEMO Timecode cable, 40.6 cm


Antennae, SMA Straight Flex Black (included with A10-TX)


Timecode cable, BNC to LEMO 3-pin. To connect external timecode sources to the A10-TX.


Timecode cable, LEMO 3-pin to BNC. To send timecode from the A10-TX to external timecode clocks.


Neoprene case for A10-TX

Technical Details
A10 Digital Wireless System Frequency Range: 470 - 694 MHz
Transmitter Switching Bandwidth:
A10-TX-A (470–548 MHz)
A10-TX-B (518–608 MHz)
A10-TX-C (594–694 MHz)
A10-TX-D (534.2–629.8 MHz)*
transmitters are tunable in 25 kHz steps
*Note: A10-TX-D is intended for customers in Europe who want the flexibility of working in the United States but want to keep Ch 38, 39, 40 (606-630MHz) for UK, and some parts of Europe.
Modulation Mode: Audio Ltd proprietary digital RF modulation
Digital Audio Codec: Audio Ltd proprietary, high-performance digital encoding algorithm
Audio Frequency Response: 20 Hz–20 kHz
RF Output Power: 10 mW, 20 mW, 50 mW, selectable
Audio Gain Control: 0-40 dB in 10 steps, menu and remote control
Low Frequency Cut:  flat, 50 Hz, 80 Hz, 120 Hz, 200 Hz, user selectable
Input Connector: 3 pin Lemo (series 00)
Input Type: Microphone or line level, balanced or unbalanced
Bias and Phantom Power: 5 V Bias, 12 V or 48 V phantom power
Menu and Controls: OLED menu display, 3 button navigation
Powering: 2 x 1.5V LR6 AA size, lithium, NiMH, or alkaline
Privacy: User settable Audio Ltd proprietary
Operating Temperature Range: -10 °C to +55 °C
Weight and Dimensions: 104 g, 83 x 64 x 18 mm


Two Channel Digital Diversity Receiver