I bought Grado SR60i about a week ago, and was comparing them with Senheiser HD580. Then I found out that SR60i needed more volume than HD580 out of NAD integrated amp's headphone jack. With the volume knob at the same position, HD580 was louder than SR60i despite it's higher impedence. However...

Hi, I recently bought a sansa clip (4gb) and find it's not loud enough with KSC75. Well, just enough when I turn up the volume about 90% of its maximum even with the volume set to "high". I have c240 and don't usually turn it up more than 70% of its maximum. Is it normal, or something wrong...

I can get them for $20 loacally (craigslist). I think they are from 70s. Are they any good?