Before there was Beats, there was Bose. The QuietComfort line is the original über-popular headphone line, even if it's aimed more at business travelers than teenagers and celebrities.
Powerful lows and crisp, bright highs with no distortion at top volumes; Exceedingly comfortable; Best noise-cancellation technology available; Can be used as passive headphones without power
Runs on a AAA battery rather than a built-in, rechargeable option; Sculpted sound signature is not for purists; No auto-off function