The HeadAmp4 features 1/8 inch and 1/4 inch inputs and outputs, providing less noise, less distortion, and more output in a new, custom-extruded stackable metal housing. Ideal for virtually any home or project studio, the ARTcessories HeadAmp4 easily adds extra headphone outputs to any mixer, computer audio interface, workstation, iPod, media player, or laptop without overloading the existing headphone source. Individual level controls for the four headphone outputs, along with 1/4 inch and 1/8 inch connections, allow the HeadAmp4 to connect to virtually any source and control any headphone configuration, including studio headphones, in-ear monitors, custom earbuds, or a combination of the above.