Premium sound minimal cost. The KRK KNS 6400 are designed with the professional recordist and mix engineer in mind. Providing a large dynamic range with a detailed natural wide frequency response the KNS 6400 is the ideal choice for recording mixing and mastering. KRK ensured that the 6400s would be lightweight and comfortable making them the ideal companion for long recording sessions. A luxurious soft case embossed with KRKs logo is also included to store the sleek compact headphones perfect for on the go or simply storing when not in use. The 1/4-inch jack plug can be easily unscrewed to reveal a 1/8-inch plug guaranteeing compatibility with every computer and interface. Theres good reason why Sound on Sound magazine value them so highly.