i will let the chart do most of the talking here. It sounds different from the 250ohms version for sure. Treble is not piercing at all with excellent definition. It has a massive boost at 12-16k and bass falls sharply below 70hz. Though i think the bass has good punch and is highly detailed. There was a dip at 4.5khz i had to fill out. any more than 2.5db of boost at 2-3.5k makes vocals sound honky. taking out the boost at 12-16khz removes hiss and does Not degrade definition.