SoundTube SM31-EZ-T Premium 3" Surface Mount Speaker with Transformer

The Soundtube SM31-EZ-T is a 3″ premium full-range speaker, with overall dimensions smaller than a 4 inch 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.


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-inch subwoofer may be incorporated. Find Great prices and in stock and ready to ship!

SM31-EZ-T 3″ Premium Full-Range Surface-Mount Speaker

  • Includes a 10-watt transformer.
  • One 3 inch (76.1 mm) polypropylene driver with butyl rubber surround
  • Weatherized components for indoor/outdoor applications.
  • Theft- and corrosion-resistant mounting mechanism with an indexed swivel-joint for precision aiming in any direction.
  • Ultra-low profile ZeroReflection™ ABS enclosure (4 inch diameter by 3.5 inch deep, including mounting plate).
  • Five position selectable tap switch
  • Corrosion-resistant, powder-coated aluminum grille.

Soundtube SM31-ez-t Specs

Frequency Response(-3 dB) 170 Hz – 14 kHz
Low Frequency(-10 dB) 120 Hz – 22 kHz
Sensitivity 85.0 dB
Power Capacity RMS 20 W
Max SPL dB @ 1 M 98.0 dB
Nominal Impedance 8 ohm
Transformer Options 1.25 – 20.0 W 70.7v (optional)
Woofer 76.1 mm (3.0 in) poly
Full-Range Drivers 3″ poly
Connections Screw terminal
Height 110.4 mm (4.35 in.)
Diameter 110.4 mm (4.35 in.)
Depth 96.9 mm (3.81 in.)
Weight 0.6 kg (1.4 lbs.)
Shipping Weight 0.9 kg (2.0 lbs.)
Colors Black or white