Hello, I own these headphones https://www.alza.sk/a4tech-bloody-g500-d2142180.htm#popis. Unfortunately, I have such a bigger problem with them. After connecting the 4-pin connector to my mobile phone, I hear such a dull voice. I just play some music but I only hear music and not the singer who sings. I got the hearing aids so I could plug them into a PC the same. It only helps to pull out a 4-pin connector. But then unfortunately my mic doesn't work.