inputs.text: sounds worst beyerdynamic dt 990 250ohms - looking many positive reviews sound quality ordered fiio x3 dacamp pairing beyerdynamic dt990 250 ohms headphones short sound quality fiio x3 not good get iphone 5s x3 make dt 990 sound louder no way better iphone tried playing 24196 flac mp3s frankly could not impressed tried listening hours thinking ears would adjust like music not happen experience using x3 dt 990however may working better headphones