Russound Source Equipment - With the ST2 Smart Tuner and your Russound multi-zone system you can listen to two separate AM/FM channels in different rooms at the same time. A single set of controls and display gives you two simultaneous broadcasts from Russound's compact single-space chassis. Russound's patented RNET® technology integrates the ST2 with a Russound RNET multiroom system. The system's Smart Keypads display what's playing in each room.