I just recently purchased a pair of Xiaomi Piston 2 earphones on Amazon seller VZTECH, who had absolutely outstanding reviews when I made the purchase.  I got the headphones in the mail and was really excited to try them out. They sounded like trash.  Utterly trash.  I question whether you...

Hi guys, I'm brand new to the forums but after searching and searching for a fix that I would be happy with, I've unfortunately come up empty, so making an account and starting a thread seemed like my last resort. As the title suggests, I want to take my Sennheiser HD558 headphones and add...