I have owned and monitored the Slam SE MPX3 with the Black Dragons, and am absolutely thrilled by the synergy between this amp and this phone providing just incredible impact, seperation, and sheer musicality.
The low level detail that the Black Dragon GS is able to retrieve is just a wonder, and in terms of soundstage which is dense from back to front..the varying volume levels that make up the finished track really help to shine different proponents of the GS's headstaging and fine imaging capabilities. When passages become complex, the BDGS begins simplifying
This is a very, very resolving phone, and with the Slam SE and 6414 in the gain position, the presentation is not only transparent but full of dyamics..all in all this phone excels and scales up where other Grado phones can not.
I am very satisfied with my pair