I have been using a E09K to power my DT990 600ohm cans for over two years now, long enough that I don't really remember exactly when I got it but for sure over two years.  I use this thing every single day for hours each day because it is part of what I use for my work.  It literally could blow my 600ohm cans if I pushed it loud enough I'm pretty sure, I never ever go above half volume because it literally hurts my ears and probably is causing hearing damage when over half ''so I just don't''.   Two years and not a problem at all except last night...

I owned a pair of the Z6A headphones and got them to replace my broken Turtle Beach HPA2 headphones. Lets just say I still wound up using the HPA2's two weeks after the Z6A's arrived.   Cons: Very poor sound quality, Cheep plastic parts that will brake, Notorious for having lose wires in the cans, The amp picks up interference from to much - ''modem's, router's, microwave and cellphone'' they all cause a buzzing sound in the headphones simply because of the poor quality amp that sits on your desk.    The build quality is so poor that the left...