Well, this is the kind of news that I was fearing. I had an original goal to use a budget of 500 dollars to get a pair of headphones. I'm not able to spend another 80 dollars I hadn't planned to spend, especially when I'm not sure what the difference in sound will be. Though, it looks like there's enough people on this site to convince me that they do in fact need an amplifier. In that case I will probably end up returning these headphones and the DAC (it's a schiit modi). Is there any headphones + amplifier that would sound good for metal? I want to take advantage of the return policies I have right now, and in the end I'll probably still want a high end audio equipment upgrade from my Logitech G35s.
Maybe this isn't the right thread to ask. Is there a thread I can use for this discussion?
I'd kind of compare your situation to buying a Mercedes Benz, but then not having any money left over to put gas into it to be able to drive the vehicle.