The SM31-EZ(-T) is a premium full-range 3 surface-mount speaker, with overall dimensions smaller than a 4 sphere. The SM31-EZ(-T) incorporates a proprietary attachment with indexed swivel-joint for complete hemispherical aiming. Components have been weatherized for indoor/outdoor applications. Applications Engineered for rapid installation and low profile mounting for smaller venues, the SM31-EZ(-T) is ideal for retail, restaurants, conference rooms, patio areas, educational facilities or any setting where full-range intelligibility, unobtrusive design and installation ease are paramount. For additional bass response down to 41 Hz (- 10 dB), the SM1001p powered 10 subwoofer may be incorporated.