Craig has never been enthusiastic about balanced rigs whenever i talk to him... and he's the type that builds things that he thinks are better and not just marketable.
from my conversation with him it has "dual differential drivers" and has a "pure class A outputs stage."
Oh and understand it is better than most headphone amps at powering the k1000 but it is not as good as a seperate k1000 amp yes balanced it will put out the quality juice to make the k1000s sing, single ended it's ok but not top class.
To those that are interested if you want a run of single ended Red Tops/Hats I would contact Craig directly. I don't think he would do just 2 or 3 as it would not be cost effective.