... honestly I'm happy to hear that. I have mostly Low Impedance cans that I want to pair with it
They aren't really designed to power low-impedence high sensitivity headphones such as Grados or the Sony's, you'll get background hum.
probably but i wrote in another post that the MKVI with my hf-2 recabled was one of the best combos that i listened.
no hum at all.
but, of course, ther needs to experience with another low impedance headphones