Aeromix 2+2 SE Mixer. Designed specifically for Fitness Instructors by Fitness Audio. The Aeromix has a limited number of easy to use knobs which give instructors the ability to adjust the tone quality (bass & treble) of the microphone independently from the music’s tone. This allows quick adjustment of any feedback issues out of the microphone mix without affecting the music quality. Hidden master volume on the back of the unit for overall manual volume control. The newly designed Aeromix 2+2 SE mates with optional Sound Ear decibel monitor for automatic volume control. 2 Mic Inputs, 2 Music Inputs with front panel iPod Input. 2 Sets of Outputs.