AKG K-702S review by Srajan Ebaen, Chief Editor of 6Moons. featuring the Burson Audio headphone amp HA-160:

“AKG K-702s demands top quality amplification with drive and painfully long break-in. Essentially a studio monitor spoon-fed on neutrality and resolution, not an editorializing home hifi design. Properly driven, it is not however a flat, dull, uninvolving sound at all. It simply needs muscular amplification of high caliber. The €499 Burson Audio HA-160 is just perfect. ”

Full review: http://6moons.com/audioreviews/akg2/702_2.html