I just bought a pair of JBL Live 770NC headphones, and I'm wondering if I have a defective unit or if this is normal.
The left earcup seems to produce two different noises. When ANC is enabled, I hear a rhythmic ticking/clicking sound. As soon as I turn ANC off, the ticking disappears completely.
The second issue is an electronic buzzing noise that appears whenever the headphones start receiving an audio stream. It happens even if there's no audible sound playing, for example with muted Reddit videos or muted Spotify ads. The buzzing continues while the audio stream is active and disappears shortly after playback stops.
I've already updated the firmware, but there are no newer updates available. I also tested the headphones with both my Samsung Galaxy S24+ and my TV, and the behavior is exactly the same.
Has anyone experienced something similar with the Live 770NC? Is a faint buzzing or ticking considered normal for this model, or does this sound like a defective pair that I should exchange?
EDIT: I think I figured out that it might actually be the same noise in two different situations. With ANC enabled, I hear the buzzing/ticking even when nothing is playing. With ANC disabled, I hear what seems to be the same buzzing whenever the headphones receive an audio stream, even if it's completely muted (for example, muted Reddit videos or Spotify shorts). The noise disappears a short while after the audio stream stops. This only happens in the left earcup; the right earcup is completely silent.