Which earphone enthusiast can help me look at the anti-counterfeiting of AKG420?

I have K420, too. It was designed by Austria and made in China. The earphone works well, there is no cock crowing, and the noise at the bottom is usually caused by the front end. It has little to do with headphones (provided they are not bad and genuine). As far as anti-counterfeiting is concerned, AKG's domestic agent is Ya Dun Company. His safety label has been used for three generations. What you see in the market at present should be the second generation and the third generation. Can check the authenticity through SMS, telephone and Internet.