Q30 background noise

I have q20 and q30 and I found a strange background noise on the q30. It’s like a rustle or crackle especially when I listen to edm music. For some reason the sound quality is not as clear as the q20. I’m getting mad comparing few tracks and the problem persists. Soundcore suggested me some troubleshooting tips but nothing worked. Probably they sent me a defective item??

4 posts were merged into an existing topic: Left cup crackling due to ANC problem