Huge value for money here. Detailed, analytical sound from the latest version of a design over 40 years old. Semi-open backs make them ideal for mixing and other studio use where isolation isn't a priority. Supplier notes: Improved AKG vari-motion transducers for the utmost in sonic accuracy and wide bandwidth. Detachable input cable with locking mini-XLR connector makes transportation and servicing easy. Ear-pads can be removed easily for cleaning, and it comes with both leatherette and velour ear-pads for customized comfort. 55 ohms impedance and high sensitivity for compatibility with any output device. Includes gold-plated, screw-on mini 1/4" adapter, velour and leatherette ear-pads and 10' straight and 16.5' coiled cables.