Make sure the headset volume control is turned up and your microphone is unmuted. Check that only one voice chat application is in use while in-game. If you're connected to the PC, make sure that the communication device is selected under Control Panel > Sound > Recording. Select the JBL product and select "Set as Default Device". Check on the top bar of the JBL QuantumENGINE whether your headset's game-chat balance dial is set correctly.