Heya,
Was just testing the Q701 on an E11 (set on high-power output), compared to an Asgard & Lyr. The E11 actually powers it fine. For my listening level, I rotated to notch 5 on the E11, so it still has a lot of overhead even. And the bass lover in me has the EQ set to 2. The sound stage was wide open, was just enjoying some Rostropovich, Robyn, Louise Rogers and Ayreon and it sounded pretty much what it sounds like when I'm on my Asgard (though the Asgard is a touch brighter in signature I find). The Q701 seems relatively easy to drive. I definitely like it better than my K701. The K701 was boring and lifeless to me, but the warmth of the Q701 makes it fantastic. The Q701 drops low too, so it satisfies the bassy needs I have. And it responds well to minor equalization for taste. Great headphone.
Very best,