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 device is selected under Control Panel > Sound > Playback. Select JBL Quantum 910 Wireless Game, right-click, and select "Set as Default Device".  Check your headset's game audio chat balance dial and ensure that the balance is correct. Check the JBL Quantum 910 Wireless Game device and make sure it is not muted or turned all the way down.