HA-8P is an active converter featuring amplify circuit for personal monitor application. Its built-in battery helps HA-8Pto performance. XLR or 1/4”make plugs connection of a personal monitor mix. Volume knob adjusts the output level and powers the unit off when turned counterclockwise. The adjacent green led will lit when the power is on. The inner switch should be set to mono when used with a mixer’s aux send or any other mono source and set to stereo when connected to a headphone output or other stereo source.