Before that there were V-Moda Crossfade m-100 (for the sake of bass), a lot of Marhalls (for the sake of rock, style, convenience). I understand why there are 17 hours, not 40, power at the very bottom, and not cheap thumping. I listened to Sony xm4 - not at all close in sound. Even what you hardly hear (sub lows, over highs), they honestly play back, which gives an overall picture of honesty, density and transparency of sound. Everything and attention plays well - for the first time on wirelessSee full review