If you're talking about me I'm pretty sure my E9+DAC amps it fine. Just look at all the headphones I used to have and ones that I currently own. Do you seriously think I run them unamped? By the way, if you didn't know amps, will barely change the sound signature of it's output; objectively that is. My E9 will not suddenly give the SRH840 a fun midrange but equalizing will.