Pros: fantastic sound stage, clear throughout the frequency range and very detailed
Cons: lacking in bass but not a bad thing especially for mixing
Having never heard open-back headphones before i was looking forward to being able to hear mixes as they should be with accurate stereo representation and i wasn't disappointed.
I can only compare the AKG K 702's to a pair of KRK 6400's and studio speakers such as KRK RP6 G2's. Compared to the KRK headphones, as expected the sound reproduction is much more detailed with greater separation between instruments and nothing getting lost in the mix.
For mixing on the move or when you don't have access to studio speakers the K 702's are possibly as close as you can get to being able to mix accurately with a nice flat frequency response.
For music the K 702's may be a little cold and analytical to some. The lower frequencies are not emphasised so while being clear and well defined, they sound lacking compared to more commercial headphones that i have listened to such as Dr Dre Beats but no more lacking than the KRK headphones. Compared to studio speakers as to be expected with headphones, being just as accurate but lacking in impact.
At the time of writing this review i have just been using the headphone output of my macbook pro 13" and my iPhone 4. The headphones are powered well and have enough volume, but i feel they would probably benefit from a good headphone amp, i tries using a Pod XT which gives out a lot more volume than needed but doesn't sound like it improves on overall sound quality.
Out of the macbook pro 13" and the iPhone 4 the SQ is slightly better with the iPhone which has led to me ordering an Apogee One, did consider a Fiio e17 but as a sound engineer i prefer the option of having a microphone and instrument input as well.