If I perceive 1dB change.. Am I unhealthy? When I was building an amp, I first connected one channel to the receiver pre-out, then adjusted it by ear with 0.5 dB steps to the other channel connected to the receiver amp. I had to add 3dB to perceive it as balanced, adding 0.5dB more or less than that sounded unbalanced. Final result after measurement - I was as precise as Audyssey in calibrating levels
The MV in my car change level in 1dB increments. It is perceived quite clearly also.