Pre Sonus-HD7-Full-Range-High-Definition-Studio-Monitor-Headphones-Pre Sonus-300-500-050-These-studio-monitor-headphones-feature-an-extended-bass-response-thanks-to-the-precision-tuned-semi-open-acoustic-chambers-&-high-resolution-drivers-Sound-quality-is-exceptional-deep-low-frequencies-wih-a-balanced-yet-powerful-bass-punch-Accurate-midrange-&-extended-treble-response-gives-a-high-resolution-sound-enabling-the-fine-details-to-come-through-br-br-The-headphones-have-a-lightweigh