To test mostly classic songs were used.
Therefore, once again here in brief:
AKG K99:
Semi-open circumaural &
Comfort very good
Leatherette (?) - Upholstery, among which it is already beautiful warm and humid after 30 minutes.
Balanced lows, mids difficult to see highs well; Overall, however, a muddy / verwaschender tone that is not differentiated enough.
Klint for me very strange (tinny?) And I loved listening to music so that no living & given familiar feeling.
Beyerdynamics DTX710:
Also open & circumaural.
The pull-out bracket are unstable to me "gridless" and.
The fabric upholstery is very pleasant, being carried out at these closed headphones do not get warm ears even after a long time; Unlike the K99
The cable is very thick (s. Other comments).
The depths are strong but balanced. The centers are good to very good and so are also the heights.
Overall, in direct comparison with the K99 seehr a distinct sound picture, in which each "layer" of instruments (bass, mid, low) is clearly identifiable and locatable. By contrast, the K99 acts tinny and washed out.
According Beyerdynamics the DTX710 should have 'a pleasant sound with a powerful bass'. This statement I can only confirm!
Therefore, the DTX710 is my clear favorite.
Anyway, I can people who are faced with a purchase decision at beginner / Billigsementkopfhörern, only guess this model once with shortlisted or take a direct comparison.