Quote: Thank you for a quick reply. The whole trouble is that I don't want to kill the portability factor (an amp would make me have to sit down to listen). There's a 32ohm version but they're overpriced (in Poland it's $180 vs $250) and these also might compromise on quality. I will keep...

Hi ! Don't have anything to show yet, just a quick question. What was the highest impedance value of the headphones you've used your iPhone 4 with? I am thinking of 80ohm dt770.

Hi everyone! Do you think my iPhone 4 can handle DT770pro 80ohm? I am thinking of getting myself a pair, but the volume limit dilemma brings me second thoughts. Has any of you tried? Also does 2x impedance mean about 2x less volume (is it linear)?