A10-TX-US Digital Wireless Transmitter
Compact Digital Wireless Transmitter with Phantom Powered Microphone Input
The A10-TX-US transmitter is the heart of the A10 Digital Wireless Systems for the U.S. The core of the A10-TX-US transmitter is its low-noise, high-dynamic-range analog input. It accepts 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.
- Low-noise, studio-grade balanced input for microphones and line level inputs with analogue limiter and 48 V phantom power
- All-digital RF modulation for full bandwidth, ultra-low distortion, and high dynamic range
- Built-in Bluetooth® to remotely control the A10-TX from an Android or iOS device using the A10 Remote app
- Powered by two AA (LR6) batteries


CAS Quarterly Tech Review:
"We all know that Audio Limited has a reputation for excellent sound quality but how’s the range? My overall satisfaction with the A10 system was high. I was surprised with how well the system held up, especially since it was only transmitting at a maximum of 50 mW.... Shall we say, more bang for your ‘buck’ (or ‘milliwatt’)?"
Built for Wireless Boom
The wireless boom has become a requirement for many productions. The A10-TX-US is the first digital wireless transmitter that accepts either lavalier microphones or a phantom-powered balanced microphones. With the A10-TX-US mounted on the boom pole a user gains numerous advantages, including:
- 1/4-wave antenna in free-space for maximum RF radiating efficiency,
- The flexibility to mount the transmitter at the top, bottom, or clipped to a boom operator's belt,
- A true balanced input with superior noise rejection and immunity to induced RF interference,
- Integrated digital recorder with precision timecode generator (for Mic / Line-level operations),
- Convenient Bluetooth control,
- Built-in 12 or 48 V phantom power with a full 10 mA supply,
- One unit which accepts lavaliers, balanced microphones, and line-level camera hop signals.

A10-TX-US Transmitter Specifications
Features and specifications subject to change.
A10 U.S. Wireless System Frequency Range | 470–608 MHz |
Transmitter Switching Bandwidth | A10-TX-AU (470–548 MHz) A10-TX-BU (518–608 MHz) transmitters are tunable in 25 kHz steps |
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 |