Thanks Guys. I guess I'll give it a shot. Really hoping that this doesn't lead to my wanting to buy a dedicated headphone amp!

  Sorry if I wasn't clear, I'm currently using the D1.

Bit of a shot in the dark, but I was wondering if anyone here has ever tried driving these with the Audioengine D1. I've been thinking of picking up a pair of these, but Zeos' stressing the need of a strong amp has kind of scared me off, and I'm not looking to upgrade my DAC/Amp quite yet.