Designed for the discerning audiophile, the Pioneer SE-MASTER1 High-Resolution Stereo Headphones features 25?-thick aluminum diaphragm that is treated with a ceramic coating. This results in high-resolution sound across all frequencies with minimum noise. The SE-MASTER1 can produce high-resolution audio up to 85 kHz for an unforgettable listening experience.Each SE-MASTER1 is engraved with its own serial number, making it unique to you. An optional balanced XLR cable is available for the SE-MASTER1, suitable for use with a headphone amplifier to deliver high-resolution sound quality. What's more, Air Studios in London worked together with Pioneer's engineers to develop the sound that's equally suitable for recording, mixing, and mastering in a professional studio environment. The Pioneer SE-MASTER1 ships with a 9.8' cable with a 1/4" connector and two tension rods.