The LD Systems HPA6 6-Channel Headphone Amplifier is a flexible amplifier with enough features to cater for a wide variety of professional monitoring applications. Each of the 6 outputs has an individual level control and sound source balance providing independent balance alterations between main and aux inputs. The 6 Channel Headphone Amplifier has a front headphone connector and 2 rear connectors for each channel providing a total of 18 headphone outputs. The HPA6 is easily mountable in 1U of space in a standard 19 rack case.