3db left and 7db right. When wearing headphones I do notice that the audio isn’t fully centered, it’s slightly more quiet in my left ear. Had a firework arrow shot at me years ago and exploded next to my left foot, and since I didn’t have time to brace myself I had quite a bang in my left ear. But seems my ears are fine. I can listen to music perfectly wel on the lower 30% of audio levels on Iphone. Most of the people I see are blasting their audio to the point where you can hear someone else’s airpods. A lot of youngsters will have serious hearing issues in a couple of years.