Sony MDRV6 Studio Monitor Headphones with CCAW Voice Coil Connectivity Technology: Wired Neodymium magnets and 40mm drivers for powerful, detailed sound Over-ear design provides comfort and outstanding reduction of external noises 10-foot oxygen free copper cord ends in 3.5mm plug; 1/4-inch adapter included Copper-clad aluminum voice coil wire for improved power handling Wide frequency response of 5 Hz - 30 kHz