Sennheiser HD 650 Audiophile HeadphonesHD 650 A benchmark for total audio immersion, the HD 650 reproduces the subtle details in your music with the same confidence as the highlights. With a fluid signature tuned for hours of fatigue free listening, it is the headphone to reach for when the music matters most. The (high) definition of smooth. With expertly balanced acoustics, luxurious construction and timeless design, the HD 650 has all of the perks of a high performance sports car and