Tag: A20-TX

A20-TX v7.62 Firmware

Download Firmware v7.62


  • Faster NexLink power on/off 


  • Updates to Country List Data.


  • The Auto-Resume Record when Powering On function now works without having to power down the transmitter first. 
  • The orange remaining battery runtime indicator no longer comes on too soon for certain combinations of battery type and current draw.

Wireless Live-streaming Event

Dec 4, 2023, 5:00 PM
Online US

If you’ve heard about the impressive features that our Astral wireless series offers, but you’re wondering how best to fit the products into your setup, this live, interactive webinar is for you. Cody Heimann, a consultant for Sound Devices with a remarkable portfolio of live sound gigs, will host the streaming event to talk overall about the Astral line and how it coordinates with other products in a wireless sound system.

You are welcome to submit questions for Cody in the form below, and he will be taking questions live during the event, so you can get your questions answered.

To attend the event, you must fill out the form below.

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A20-Nexus Go

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Sound Devices L.A. Wireless Workshop

Sep 15, 2023, 10:30 AM – Sep 18, 2023, 4:00 PM
Amsterdam NL

Visit Sound Devices at stand 8.C95 at the IBC tradeshow, September 15th-18th in Amsterdam, to get hands-on demos of the latest additions to the Astral family – A20-Nexus Go and A20-TX. The newly introduced A20-TX digital wireless bodypack transmitter has a multipurpose input, flexible powering, and ultra-low-power e-Paper display. Also making its IBC debut will be the A20-Nexus Go multichannel true diversity wireless receiver with 169-1525 MHz global tuning range via SpectraBand, NexLink long-distance remote control of transmitters, and integrated RTSA (real-time spectrum analysis).  

The A20-TX transmitter and A20-Nexus Go receiver will join other Astral-family products in the Sound Devices booth, including the A20-Nexus multichannel, true diversity wireless receiver with SpectraBand, NexLink RTSA, and Power-over-Ethernet and audio via Dante; the svelte A20-Mini bodypack transmitter with GainForward and SpectraBand; and the A20-RX 2-channel slot-in portable true-diversity wireless receiver.  

We will also display our 8-Series line, which includes Scorpio, 888, and 833 mixer-recorders. Designed specifically for sound professionals’ workflows, each 8-Series mixer-recorder has unprecedented recording power and a rugged, efficient interface.   

We plan to celebrate our 25th anniversary in a special way at IBC this year. In addition to demoing our MixPre II Series audio mixers, with crystal-clear, ultra-low-noise Kashmir preamps, 32-bit float bit depth and a 192 kHz sample rate, we’ll have an opportunity for a stand visitor to win a limited-edition silver MixPre-3 II mixer-recorder. Visit stand 8.C95 to learn how to enter the drawing! 



How does the A20-TX compare to other Sound Devices transmitters in size and weight?

The table below details the size and weight for the different transmitters:
A10-TX A20-TX A20-Mini
Dimensions (H x W x D)
  • 3.3 x 2.5 x 0.7 in
  • 8.3 x 6.4 x 1.8 cm
  • 3.2 oz (without batteries)
  • 104 g (without batteries)
Dimensions (H x W x D)
  • 3.3 x 2.5 x 0.71 in
  • 8.5 x 6.4 x 1.81 cm
  • 3.2 oz (without batteries)
  • 98 g (without batteries)
Dimensions (H x W x D)
  • 2.98 x 1.88 x 0.74 in
  • 7.58 x 4.8 x 1.9 cm
  • 1.6 oz (without batteries)
  • 51 g (without batteries)


What are the battery powering options

The table below details operational characteristics for the different recommended AA battery chemistries:
Battery Chemistry Recommended Model Required No. of Batteries Chargeable in the A20-TX
NiMH Eneloop or Eneloop Pro 3 No
Alkaline Energizer or Duracell 3 No
Lithium Primary Energizer Ultimate Lithium 3 No
Li-Ion Xtar 14500, 3.7V, 800mAh 1, 2, or 3 Yes
LiFePO4 Shockli 3.2V, 650mAh 1, 2, or 3 Yes

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