The CR2-X Cube Compact Desktop Speakers from Mackie feature BMR driver technology that delivers clear audio throughout the entire room. BMR Technology Balanced Mode Radiators (BMRs) are designed to produce a wide output of frequencies to ensure clarity no matter where you're listening in the room. BMRs use a specialized transducer technology that produces a full range of sound, all from a single driver. Because of this technology, the CR2-X is able to deliver huge, room-filling sound from a compact footprint, unlike traditional studio monitors.