DT 990 Pro

I've had these products for quite a while now: Products: Beyerdynamic DT 990 Pro Headphones FiiO E10 USB-Powered Headphone DAC Sometimes audio only comes from the left-side of the headphones. The right-side is silent. I have 'mono audio' switched off. I've tried disabling/enabling the...

Please help i bought BeyerDynamic DT 990 pro 250ohm headphone My pc : Gigabyte Z170X gaming 7 i used rear 3.5mm for my headphone but i have a problem , When I turn up the volume too much, the bass sound of the headphones distorted headphone speakers shaking and sound very bad in Higher...