The MX225 is designed for remote volume control of multiple amplifiers or self-powered speakers in a distributed audio system. There are two stereo sources available for each of the five output zones. Each pair of source inputs handles separate balanced line-level left and right signals. Each output zone features independent level control from inputs 1 and 2, a stereo/mono selector with a mono indicator, an LED level meter, and balanced left and right line-level zone outputs. All audio connections are balanced XLR. The built-in power supply and 19″ single-height rack-mount format allow for easy installation and reliable operation.