The SM31-EZ is a premium full range 3 inch surface mount speaker, with overall dimensions smaller than a 4 inch sphere. The speaker incorporates a theft and corrosion resistant mounting mechanism with indexed swivel joint for complete hemispherical aiming. SM31-EZ speaker components have been weatherized for indoor and outdoor applications. The SM31-EZ is an 8 ohm speaker with an ultra-low profile ZeroReflectionABS enclosure (4 inch diameter by 3.5 inch deep, including mounting plate). IP-Rating: IP64.

SoundTube SM31-EZ

One 3” (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” diameter by 3.5” deep, including mounting plate). • Five-position selectable tap switch with optional AC-SM31-EZ-XFMR accessory. • Corrosion-resistant, powder-coated aluminum grille. • UL 1480A approved. • IP65 Rated. • High quality black or white paint finish. • Optional accessories: 10 W transformer (ACSM31-XFMR) that incorporates a 5-position tap switch and a wall plate for installation in a single-gang deep junction box.

SoundTube SM31-EZ Specifications

Color Black
UPC 752830446380
Manufacturer SoundTube
Manufacturer's Category SM-EZ Economical Surface Mount
Height 4.35 in / 110.5 mm
Width/Diameter 4.35 in / 110.5 mm
Shipping Weight 1.85 lbs / 0.84 kg
Carton Height 6.25 in / 158.75 mm
Carton Length 6.5 in / 165.1 mm
Carton Width 6.25 in / 158.75 mm
Certifications CE, RoHS, UL1480A
Enclosure Properties ABS Glass Fiber Reinforced, Injection Molded, Sealed
Enclosure Volume 60 cu in / 983.22 cu cm
Optional Accessories Junction Box (AC-SM31-JBOX)|Black Transformer (AC-SM31-XFMR-BK)|Black Wall Plate (AC-SM31-MP-BK)|Black Grille (GRL-RS31-BK)
Source Inputs Terminal Strip
IP Rating IP64
TAA Compliant (Trade America) No
BAA Compliant (Made in USA) No
Coverage Angle (±6dB @ 2kHz) 43°
Directivity Factor (Q) (Averaged 100Hz - 10kHz, @ 2kHz) 4.9 and 7.1
Directivity Index (DI) dB (Averaged 100Hz - 10kHz, @ 2kHz) 5.1dB and 8.5dB
Frequency Response (± 10 dB) 120 Hz - 22 kHz
Frequency Response (± 3 dB) 170 Hz - 14 kHz
Grille Properties Aluminum, Powder-Coated
Low Frequency Voice Coil 0.75 in / 19 mm
Max. Continuous Power RMS 20W
Max. Program Power 40 W
Minimum Impedance (Ω Ohms) 8 Ω
Mounting Depth 3.81 in / 96.8 mm
Nominal Impedance (Ω Ohms) 8 Ω
Fullrange Driver 3" Polypropylene driver with butyl rubber surround
Sensitivity dB @ 1W/1M 85 dB
Sensitivity dB @ 2.83V/1M 85 dB
Transformer Options 25 / 70.7 / 100 V
List price: $105.00
Price: $105.00