SoundTube SM31-EZ-BK 3-Inch Surface Mount Speaker, Black

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).

Technical Specifications

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
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
Magnetically Boosted
No
Max. Continuous Power RMS
20W
Max. Program Power
40 W
Minimum Impedance (Ohms)
8 OHM
Mounting Depth
3.81 in / 96.8 mm
Nominal Impedance (Ohms)
8 OHM
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