To clarify: are you saying that the SE output on the QP1R is more powerful than the SE output on the QP2R? Or are you saying that the SE output on the QP1R is more powerful than the balanced output on the QP2R.Hi Darren,
In SE the QP1R is slightly louder. I listen to the HD800 a lot out of SE on the QP2R and get very decent results.
Right now I'm assuming the former and not the latter.
Current mode amplification drives headphones it has no right by spec to drive. You've got to try it to know. With Questyle I've always find the price is high hiss with hiss prone IEMs, especially in balanced mode.