Harman JBL Quantum 300 - TROUBLESHOOTING; No Sound or Poor Sound; My Voice Cannot Be Heard by My Teammates; I Cant Hear Myself When Im Talking

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Troubleshooting
If you have problems using this product, check the following points before you
request service.
No sound or poor sound
• Make sure you have chosen JBL QUANTUM300 as the default device in the
game sound settings of your PC, Mac or gaming console device.
• Adjust volume on your PC, Mac or gaming console device.
In USB connection:
• Make sure the USB and 3.5mm audio connection is secure.
• The USB ports on some gaming console devices may be incompatible with JBL
QUANTUM300. This is not a malfunction.
In 3.5mm audio connection:
• Make sure the 3.5mm audio connection is secure.
My voice cannot be heard by my teammates
• Make sure you have chosen JBL QUANTUM300 as the default device in the
chat sound settings of your PC, Mac or gaming console device.
• Make sure the microphone is not muted.
I can’t hear myself when I’m talking
• Enable sidetone via to hear yourself clearly over game
audio.