Sennheiser HD25-II is one of hot model in on-ear headphone. I buy it because of high rating from different users. However, i feel very disappointed when I use it.   First of all, the headband structure is too tight. It makes my head painful and can't wear for more than 5 minutes, 1 song?!   Bass, quite strong   Mids - not natural   Highs - clear, but the highs are too aggressive. It hurts my ear when listening for long time.   I can't use it for more than 5 mins because of the headband pinching force. No matter how the sound is...