Tag: A20-Mini

Astral Transmitter Comparison

100% Digital Transmission
Compatible with A20-Nexus, A20-Nexus Go, A20-RX, and A10-RX
Battery LifeUp to 12 hrsUp to 5.5 hrs
VHF (169-235 MHz) Support
Tuning Range169 – 1525 MHz470 – 1525 Mhz
NexLink Long Range Control
Long Range and Standard Modulation
AutoAssign frequencies from receiver to transmitters
Privacy Key
2-wire, 3-wire Lav Mic Input
Balanced Dynamic Mic Input
Balanced Condenser Mic Input w/Phantom Power
Balanced Line Input
AES3 Input
AES42 Input
Guitar Input
AA (Alkaline, NiMH, Lithium, Li-ion, LiFePO4)
AAA (Lithium)
Sony NP-BX1
Built-in Battery ChargingLi-ion, LiFePO4NP-BX1
Compatible with PowerStation-8M Charging Station
Built in 32-bit float recording
Removable recording media
Ability to Sync Timecode via USB or NexLink
Record and Transmit Simultaneously (outside US)
A20-Remote App for iOS and Android
Web App Controlvia A20-Nexusvia A20-Nexus
Compatible with user-prgrammable A20-TX Switch
USB-C Port (for charging, timecode, file transfer, pairing)

A20-Mini TX Pack Clip

Made by: Delve.

This is a lightweight 3D printed Nylon clip for the Sound Devices A20-Mini digital wireless transmitter pack.
It accommodates both the original and BatteryDoubler battery doors.

  • Weighing  just 12 grms/ 0.4 oz, the design follows the sleek, rounded form of the pack and has been created to add minimum bulk.
  • The A20-Mini TX pack  is simply snapped into the clip and  engages with the 4 locating ‘pips’. The four ‘arms’ hold the pack in place and also allow the battery door to be easily accessed.
  • The pack can be accomodated either antenna up or antenna down.
  • Available in black, white or in a range of 7 colours
  • If you decide to buy this clip, at the checkout I would recommend selecting ‘Economy Manufacturing Speed’ and ‘Expedited Shipping’.

A20-Mini v7.40 Firmware

Download Firmware


  • A20-Mini now resumes prior power state upon battery insertion. 


  • Up to one frame timecode drift after a power cycle is now fixed. 
  • Improved NexLink range when both A20-Nexus and A20-Remote are active. 

A20-Mini v7.20 Firmware

Download Firmware

Important: After installing the firmware, it is essential that A20-Minis are unpaired, then re-paired with the A20-Nexus. 

Note: To ensure best performance, always run the latest version of A20-Mini with the latest version of A20-Nexus and A20-Remote. 


  • Orange, red, and flashing red battery colors come on at slightly higher percentages to provide more notice for low battery state. 


  • Rare momentary audio corruption no longer occurs. 
  • Occasional NexLink communication errors with A20-Nexus due to non-unique pairing IDs no longer occur. 
  • General performance improvements and bug fixes.