Each headphone amp channel also has an aux in, which allows you to independly mix in a second signal for a specific headphone channel. There are four independent headphone amplifiers here, although you can certainly hook up multiple headphones to the same amp, which allows this unit to be used with 12 headphones, or 12 destinations. It features a stereo 1/4' input on the front, 1/4' and xlr left and right inputs on the back, 1/4' and xlr left and right outputs, and connections for headphones (in 1/4 stereo form) on both the front and the back of the unit.
The Behringer Powerplay Pro-XL HA4700 is a 4 channel, high powered headphone mixer and distribution amplifier.
