Energy efficient, LEED certified and GreenSpec listed

  • Direct field sound masking system for maximum uniformity

  • Can be installed quickly in any construction or renovation project, particularly in existing spaces

  • Small footprint and sleek design blends in, and often complements architectural designs

  • Office paging, background music, and sound masking capabilities all from a single loudspeaker

Direct Field Sound Masking

Cambridge Sound Management revolutionized the sound masking industry with the development of our direct field sound masking technology, QtPro. QtPro uniformly disperses a pre-tuned sound masking signal directly into the workspace. The result is a consistent and comfortable ambient sound throughout the space.

Qt® 100

The Qt® 100 is ideal for single zone spaces of up to 12,000 square feet (1,115 m2). The Qt 100 is easily controlled from the module’s front panel, making volume adjustments quick and easy.

Qt® 300

The Qt® 300 is ideal for medium multi-zone spaces of up to 36,000 square feet (3,345 m2). The Qt 300’s system settings can be controlled via the easy-interface front panel or via any PC, Mac or tablet device using the intuitive Qt™ Monitoring and Control Software.

Qt® 600

The Qt® 600 is ideal for large multi-zone spaces of up to 72,000 square feet (6,689 m2). System settings can be easily accessed and controlled via or from any PC, Mac or tablet device using the intuitive Qt™ Monitoring and Control Software.


Qt® emitters are the backbone of the Qt Quiet Technology Sound Masking System. Qt emitters are wide dispersion direct field speakers with 1.25” (3.17 cm) drivers and are smaller than a coffee mug. All Qt emitters come in the adjustable format. These emitters deliver four uncorrelated audio channels, which provide uniform, unobtrusive sound masking. This feature, along with plug and play installation and easy configuration capability, make Qt® systems the most intelligently engineered and most effective sound masking systems on the market today for reducing noise distractions and protecting speech privacy.