I understand you are experiencing issues with your A20. Here are a few steps you can take to attempt to remedy the issues.
If using a gaming console (PS4/Xbox One) make sure the Transmitter is in Console Mode. Power button should be illuminating Blue on PS4 and Green on Xbox One. Check to make the switch on the side of the Transmitter is switched to “Console”.
If using a PC or computer, make sure the Transmitter is in PC Mode. Power button should be illuminating White. Check to make the switch on the side of the Transmitter is switched to “PC”.
Make sure the A20 headset and Transmitter are synced together. Simply plug the headset into the Transmitter via the Micro USB charging cable. Once synced together, you will see the LED lights on the front of the Transmitter will blink indicating it is synced and charging.
Make sure your optical cable is fully plugged into the back of Transmitter port that reads “Optical In” and the other end of the cable is plugged firmly into your gaming console.
Next, make sure the volume wheel on the headset is turned up to a reasonable volume.
Ensure that the game voice balance on the bottom right ear cup of the headset is somewhere in the middle.
Please test your equipment on a PC and see if you’re experiencing similar issues.
If these steps did not alleviate the issues you were experiencing, please go to the link below and submit a case. Let your agent know all the steps you tried and the outcome of your troubleshooting. It will help speed the resolution of your case!
Support Channel: https://www.astrogaming.com/contact/