Mine hasn't arrived yet but I really think you need an amp or at least a more powerful DAP . These has a sensitivity of 105dB/V (or ~93dB/mW) and the K7 series are well known to be both hard to drive (even harder then the specs indicate) and picky on systems
fieryoOoA little update. Just playing again after 9 hours running JLap Audio Burn-In. Completely different headphones... It's like they were still in the box before and I was listening through the cardboard, and now they're at least mostly out. Looking forward to the sound tomorrow after another 10+ hours of burn-in. Lesson: Don't pay attention to how they sound out of the box.
To @fieryoOo who suggested more powerful drivers, I will try that. The pono I think does fine, but will try an amp out of the Mac...
cdanuloffThis (and your last post) pretty much sums up my experience too. Out of the box they sounded very flat and mushy, after about a week of 6+ hour burn in per day they sounded much better, I'm now at about 100 hours and they sound outstanding. Very open/wide, the bass now actually exists and is fantastically clean.. Plus the memfoam cups soften and feel great (+ better seal for more audible bass).
Then I actually listened to what people have been saying for the past few month about getting an amp. My goodness these are some damn fancy cans when amped! Definitely recommend getting an amp, I'm using an AskewLabs Desktop amp which is a heavily upgraded CMoy (<£100 amp, nothing crazy), miles better than a soundcard at the same price. General improvements on all areas especialy the mids and bass, these phones sound like they were built to be amped and compatability was an after-thought.
honsatly these headphones get better with more use, Iv'e heard some users call for 100 - 500 hours burn-in before the finish changing... crazy!
Pradathe recommended burn-in time of the k701/k702 is 300hours, so it makes sense that it needs sounds better after being played for a long time. But then again, even my trusty one year old razer kraken's took about a month of burn in before the bass settled and the highs got tamed, which is also a bit ridiculus.
wowsersIf there was any reason you needed to prove burn-in exists; it would be the AKG K7 series. I've used razer before (Electra and BlackShark) and they both took about a month to settle aswell, although the £115 BlackShark had possibly the worst case of "absolutely disgusting treble" I've ever encountered.
I suppose the K7xx/01/02 have very mouldable drivers compared to others. :)
Pradarazer isn't known for the best audio quality :P and I think the slow burn-in on the akg's in general is because of the softer materials they use for their drivers (as opposed to the general cheap regular plastic membrane drivers you find everywhere else), but I have been wrong before.
KITTYbecause I brought up razer in the sense of the difference in burn-in time, even though the razer cans still sounds way boomier than any regular high grade equipment