My DCA Stealth came back home (long story) so was able to try it out ith the M8T. This is the first portable player I've had that can drive it properly. At high gain around 85 it starts even to get too loud for comfort. The bass is authoritative in metal and the sub bass in trance is deep without being bloated.
I've tried before the Hiby RS8 and the A&K SE300 with the DCA Stealth and almost bout an A&K ultra just to be able to use the headphones on the road. The closest to driving it well was the RS8, if only the volume went to 120

It was listenable but you could the struggle, especially on the bass and sub bass.