[zanox]

Bought the DT 990 pros recently. I'm driving them with my phone( getting an amp/dac soon). They are quite loud out of my phone. Initially, they were quite warm, bassy(loose bass) and slow. Also, the highs were tamed by the loose bass. After 20 hours burn in, the bass has become tighter but the highs have become sharp and more noticable. While people complained about their dt 990's sounding shrill out of the box and then taming later. mine was opposite. Is this normal? 

 

[ClassicClay]

When I got mine they sounded really wispy and such for the first few hours. I have experienced the treble becoming more prominent though. Sometimes to the poitn where a few -dB around 9000hz is much appreciated. My bass tightened up heaps as well.