The goal was to create the ultimate tool for professional DJs. Therefore, AKG teamed up with DJs to design the K181DJ. The target was obvious, to find the ultimate tool for professional DJs. High performance closed-back headphones with the best possible sound, & maximum SPL that should be exceptionally rugged & easy to bend or fold into any listening position, & provide a switchable bass boost. They have been designed in cooperation with leading international DJs. Their distinguishing features include 3D-Axis professional folding mechanism, high sound pressure level, closed-back earphones, stereo/mono selector, bass boost switch, frequency range from 5 Hz to 30k Hz, detachable cable, & rubberized finish. Unique 3D-axis professional folding mechanism allows the DJ to change their monitoring position quickly. Very lightweight construction & extremely rugged The headphones fold down into a thin package for transportation Bass-boost switch for switchable bass boost Closed-back earphones. Isolating ear cups attenuate ambient noise, keeping even quiet passages clearly audible Plug-in cable. Single cable for ease of handling, with professional mini-XLR connector Perfectly adjusted sound for any venue Stereo/mono selector for optimum single-ear monitoring