Thought id post some impressions as the intention of this thread is to provide more K500 knowledge:
Disclaimer:
My pair has been recabled, and having never heard them stock, am unaware how it affects the sound.
listening with ALAC mbp > NuForce Icon DAC > Darkvoice 336i
First Thoughts:
these AKGs are mesmerizing, trying to change songs mid way through is very difficult, somehow I am unable to click to something else (im sure you know the feeling). The AGKs definitely fill a different spot then any of my other headphones (grado, stax, sennheiser, sure). While they are lighter on bass then the rest of the crew, it never feels restrictive, more just like I am receiving a different perspective on the recording. Songs like Regina Spektors 'Fidelity' do feel a bit like they have been cut in half a bit, but it is nothing that ruins the song, just different then listening through the HD650s. Other traits I have noticed is that on say Dave Brubecks 'take 5', the sax does not have as much weight as through the HD650s, but I can hear the keys being pressed through the K500s. Ill have to decide how I feel about the AKG perspective, but the miro-details are amazing. Listening through the AKGs, it never feels like the music is coming through the headphones, but from somewhere else in the room. It makes every recording feel more like a live show. It almost feels like my Stax Lambdas are the child of the K500s and my HD650s. I still put the electrostatics above the two, but it would never render the other two obsolete. While the K500s have a huge soundstage, they arent afraid to get in your face like the HD650s. Listening to Dangerdoom's "Benzi Box", the synth intro make it feel like theres an electrical current running between you ears.
Just took them out of the box, but felt compelled to write down what I was hearing. Gotta run to dinner, but thanks team AGK, looks like you got a new convert.
EDIT/Sidenote:
These headphones were built for listening to Julie Fowlis