What brand of headphones do I need to listen to the output of a Steomour 11 amp? Do i have to change from the stero plug on the headphones to phono jacks? I am building the kit right now and I have it set for 8 ohm output.
Yes, you definitely need to get the amp up and running without it first.
With no DC supply, you will want to look for power hungry headphones, maybe something like a big planar headphone that will eat up the available power from the Stereomour and not reveal the lack of a DC supply.
I would stay away from IEMs, Grados, and other really sensitive headphones with a stock Stereomour.