Hi all,   Let me start with a short background and why I need your advice :)   10+ years ago I bought a Sennheiser HD415 mostly because I wanted a Sennheiser and this one was mispriced so I just bought it. I think I was 14 years old at the time and didn't have a clue about headphone or sound...

Finally decided to make an account, long time lurker, interested to learn more about the world of HiFi.