Model RM-3 is a rack stereo powered monitor speaker system to succeed the current model RM-2. New features include a THRU OUT, brightness adjustment of LED, and auto memory of Input / Output status etc. via newly added DIP switch on the rear panel. The RM-3 is the ideal solution for monitoring needs in various space-challenged environments such as machine rooms, video monitoring, surveillance, mobile and stationary control rooms, theme park applications where audio monitoring is needed in a compact environment.