We have found that with music material, some people can hear 3% distortion on a good system but hardly anyone can detect 1% distortion. However, 10% distortion should be obvious on all but the worst systems.刚自测了一下, 我能听出3%的失真, 分辨1%失真比较难, 有时行有时不行. 10%对我来说太明显了. 专业人士最少应该通过10%算及格. 而一般行外人士很多都听不出10%的.