The Qt Emitters from Cambridge Sound Management set themselves apart by being a direct field solution to the sound masking need. Compared to plenum emitters, direct field emtters give a much more even sound field making it less noticeable and more effective. The Qt sound processor supplying the signal to the emitters can also utilize those emitters for paging as well. With power and signal supplied by the processor, going over the same CAT3 cable with RJ45 connectors, the installation and design couldn't be simpler.