ATH-M50x sounds majorly different with different sources, DAC/AMP necessary?

[Guest]

Basically, I have a Z-97 A ASUS motherboard and an IPhone 6, which I both use with my M50xs. I feel like the headphones sound very different on the IPhone, the bass is withdrawn, and the vocals are underwhelming. I am wondering if a portable DAC/AMP could help with this.

 

[Austin evans fanboy]

they dont work for me either. maybe the drivers need to be updated?

 

[Guest]

Using latest version of realtek drivers via ASUS support website.