The term "stage monitor" refers to any sound-producing device designed to allow performers to hear the performance in real time. This includes a loudspeaker, any of several types of headphones, or, in rare cases, a seat that transfers low-frequency audio signals into physical vibrations.
Mixing input channels of audio into output channels, referred to as "mixes" or "sends," serves as the main job of the monitor technician.
According to May 2009 data from the U.S. Bureau of Labor Statistics, the national mean annual wage for sound engineering technicians -- who typically must have a year of vocational training -- was $53,940, with a national mean hourly rate of $25.93.
Often the duties of monitor engineer overlap with other members of the audio crew. The stage monitor technician, at minimum, operates the monitor console. Other duties could include installation and maintenance of wireless equipment, amplifiers, microphones and backline.