Make sure the volume control on the headset is turned up. Rotate the volume wheel on your headset to increase the volume. If you're connected to the PC via USB, check that the default communication device is selected under Control Panel > Sound > Playback. Select JBL Quantum ONE Chat, right-click, and select "Set as Default Commuication Device". Check your headset's game audio chat balance dial, and ensure that the balance is correct. Check the JBL Quantum ONE Chat device and make sure it is not muted or turned all the way down.