lier A50s+E30+P50 powe
My P50 + A50s combination does only get warm (7/24 on), unless I additionally use one of the USB outs for powering the Ipad+Dragonfly Cobalt combo, which I use as Tidal Streamer and DAC. When this pack is connected, P50 can get really hot. Getting concerned a bit on this level of temperature, I have read a lot about this issue and learned that linear power supplies getting hot is quite normal as they are not so efficient. Much of the energy is dissipated as heat. But to be on the safe side, i started using mains separately to power ipad+Cobalt .It's unpleasant to hold hand on top of P50 after some time when A50s is pluged in it. With D50s there is no such problem
P50 impressions so far, it smoothened out the sound overall, sharpness of cobalt at highs now gone (with a Sennhesier HD560s). I am quite satisfied so far.
Re my previous post on Dragonfly Cobalt + A50s combo; i ordered Topping E30 to replace Cobalt in the setup. Cobalt is not so powerful, but sound quality is good. Will report back when E30 will be in use.