Viralcow, found one of them:   http://www.head-fi.org/t/629712/best-over-on-ear-headphones-for-iphone See the third and fifth reply by takato.

Tnx Viralcow.   Looked several times now and am doubting myself if it was this forum or another. Argh. Am sure of at least two people even suggesting the AKG K 240 mkii above some other headphones for use with iPhone. Today I also walked across the K 550. Looking into that one a bit more...

Tnx for your reply.   Well, I did see some pics of that setup (Lightning to 30p>LOD>Fiio) and it seems a bit vulnerable for a mobile set. I understand the DAC thing, but if I go for an amp, I should as well go for a DAC to have more control.

Hello   I'm looking for a new headphone. I keep getting fancy with the K 272 HD but read a lot about the iPhone 4 or 5 not being able to drive it correctly. The K 240MKii should be fine believing several people on here. But the impedance (55 ohm) and the sensitivity (91 dB) are exactly the...

Hello all,   I really like the look of the AKG K 272HD headphones. Like the design, the over-ear closed shells. Since the impedance will be to high for my iPhone 5 to drive, I need an portable amp/dac like the Fiio e17. I'm still considering this setup, but the way it should be connected to...

As far as I've heard it's digital only. You need a lightning to 30-pin adapter from Apple and then use a LOD.

I can buy the AKG for around the 170 dollar. Is a LOD connector for iPhone 5 also an option (if available)?

Is there another amp/dac that will work then? I love Apple, but this turns out to be a bit dissapointing. Never had the need to spend some money on a better headphone and since I like the looks of the AKG very much, I probably need an amp. So any suggestions on this are welcome!

Reading a lot about DAC and iPhones and them not working. How about the new iPhone 5 and THE E17? Does THE DAC work with the headphone jack? Want to buy an E17 and AKG K 272HD.