VirtualludditeAre you talking about 110v vs 220v?
Those options are dependent on where you live in the world and shouldn't effect the performance of this DAC/amp.
If you live in Europe you'll want 220v, if you live in The Americas/Asia (except for some parts of Japan) you'll want 110v.
Maybe I misunderstood your question though.
The AKG K7xx is a middle/low impedance headphone (62 ohms) and they can run on this DAC/amp just fine. This is about the best option you can get for the price right now.
bean9045Haha, yeah, I realized the volts were for EU moments after posting the question. Thanks for the clarification all the same. I thought it seemed like a great price point considering the specs. Any tips on connecting it to a desktop?