If you can hear game audio through the Stealth 520 headset but the microphone isn't working, please check the following:
1. The Mic Boom is Connected Correctly
The Mic Boom must be plugged into the Mic Boom Jack on the Left Earcup of the Headset. The Left Earcup does not have any buttons or controls; all functional buttons are on the Right Earcup. The 3.5mm jack on the Right Earcup may be mistaken for the Mic Boom Jack; however, that is the Mobile Connection jack intended for use with the included Mobile Cable.
2. The Mic Boom is Plugged Fully into the Mic Boom Jack
After checking that the mic boom is plugged into the correct jack, make sure the mic is plugged fully into the Mic Boom Jack. Disconnect the mic boom by pulling it straight out and plug it back in, making sure to plug it in until you hear a "click". This may take a couple of tries.
3. The PS3/PS4 Chat Settings are Configured
If you are able to hear yourself through the headset when you speak into the mic, then the mic boom itself is working properly but the settings on your console may not be configured for headset use.
PS4: Go to Settings > Devices > Audio Devices and select USB Headset (Stealth 520). Go back one screen to "Adjust Microphone Level" and follow the on-screen calibration instructions. If the bar moves when you speak into the mic, you have verified that the mic is working properly.
PS3: Go to Settings > Accessory Settings > Audio Device Settings and select the headset as the default Input and Output Device. If the bar moves when you speak into the mic, you have verified that the mic is working properly.
If the microphone still isn't working, please contact our support team: Contact Support