About this itemAll new Philips Fidelio X3 with wide, natural soundstage and uncolored soundExquisitely tuned 50 mm multi-layer polymer (with dampening gel) diaphragms - delivers exquisitely detailed highs, full and smooth midrange, and impactful (without overpowering) bassHi-Res Audio certified. Hear the full impact of every note when wired to a high-resolution source for a lifelike performance.Open-back design. Wide, natural soundstage with acoustically transparent Kvadrat speaker fabric. By eliminating the air pressure build-up behind the diaphragms, an immersive and spacious sound is born.Premium finishing also means responsibly sourced materials. The sumptuous black Muirhead Scottish leather covering the headband is sustainably and ethically sourced.Balanced and unbalanced inputs means it is ready for your favorite headphone amp or your everyday phone and mobile devices.Detachable Balanced and Unbalanced 3 m oxygen-free cables included3.5 – 6.3 mm adapter + cable clip are also includedTechnical specifications: 5 - 40,000 Hz frequency response | Open acoustic system | 500mW maximum power input | 30 Ohm impedance | 100 db @ 1 mW sensitivity | 13.4 Oz weight