Hey all,   I'm wondering what would be the best headphone (preferably sennheiser) that would be used without driving with a portable amplifier? I am a newbie in this field but I know that higher ohm values, like 320Ω, would cause problems and user won't be getting the most out of it from...

Hey All,   I wanna upgrade my earbuds that came by iphone4 and wanted to find out what you guys think that is best out there for iphone4.   microphone, control pad and noise isolation are all a <must have> for me.   I found,    sennheiser mm50i sennheiser mm80i sennheiser...