The ART HeadAMP is an 8 output (4-channel) stereo headphone amp designed for use in home, project or professional studios. If you want more control over your own levels this is the tool for you. Whatever the application, it will come in very handy. ART HeadAMP4 Headphone Amplifier Features 4 Output Channels Each with Individual Volume Control Stereo 1/4-inch and 1/8-inch Inputs (Wired Parallel) Can be Connected to Any Line-Level Source or Headphone Output Four Stereo 1/4-inch and Four 1/8-inch Headphone Outputs Power "On" LED The HeadAmp4 offers 1/8th-inch as well as 1/4-inch inputs and outputs as well as lower noise, lower distortion and more output in a new custom extruded stackable metal case. Ideal for virtually any home or project studio, the ARTcessories HeadAmp4 easily adds additional headphone outputs to any mixer, computer audio interface, workstation, iPod, media player or laptop without creating any additional load on the existing headphone source. Individual level controls for the four headphone outs, 1/4-inch and now 1/8-inch (stereo minijack) connections allow the HeadAmp4 to connect to virtually any source, and drive any headphone configuration including studio phones, in-ear monitors or custom ear pieces or any combination of the above.