Yeah, audio feedback can happen. First, check your audio source and connection.
If you're using it in split-screen mode via HDMI, you need to manually set the G2 as the output device in your computer's sound settings. On Windows, right-click the speaker icon and select 'G2' as the output device. On a Mac, go to System Settings > Output and choose 'G2'.
The speakers are 8Ω/8W each. If the noise persists with different sources, it might be interference from a nearby power cable or device.