SoundTube SM31-EZ-T-BK Specifications

SM31-EZ(-T)

Specifications: SM31-EZ(-T)

System Type

Impedance (nominal)
Sensitivity dB @ 2.83 V/1 m
Sensitivity dB @ 1 W/1 m
Frequency Response (- 3 dB)
Frequency Response (-10 dB)
Max. Program Power
Max. Continuous Power RMS
Max. Power SPL @ 1 m
Coverage Angle (-6 dB @ 2 kHz)
Coverage Angle (-6 dB @ 10 kHz)
Coverage Angle (averaged from 2 to
10 kHz)
Angle of Pointability
Directivity Factor (Q)
Directivity Index (DI) dB
Tap Selector
Transducer - Fu

Low Frequency Voice Coil
Enclosure Material
Grille
Inputs
Colors
Height
Width
Depth (including mounting bracket)
Weight
Shipping Weight
Packaging
Included Accessories
Optional Accessories

Regulatory - UL
Regulatory - CE
RoHS

Impedance listed per IEC 60268-5 with a mini-

1

mum less than 80% the nominal impedance

2

1 W

1 m sensitivity determined using nominal

impedance

3

Frequency response measured in half or
full space as dictated by speaker mounting
configuration

4

Max program power is 3 dB above max
continuous power

5

Continuous power rating, EIA-426-B test

6

Max output based on max continuous power

1

2

4

6

ll-Range Driver

3

3

5

70.7 V Output 100 V Output 25 V Output

10 W 95.0 dB
5 W 92.0 dB

2.5 W 89.0 dB

1.3 W 86.0 dB

0.7 W 83.5 dB

Surface-Mount Speaker

Technical Information for System Engineers

3 inch full-range, surface-mount, 8 ohm with optional 10-watt
transformer for 25/70.7/100-volt applications
8 ohm

85.0 dB

85.0 dB
170 Hz - 14 kHz
120 Hz - 22 kHz
40 W
20 W

98.0 dB
70°
45°
80°

0 to 90° vertical 0 to 359° axial (full hemisphere)

4.9 (averaged 100Hz - 10kHz), 7.1 (2kHz)

5.1 (averaged 100Hz - 10kHz), 8.5 (2kHz)
Five--position tap switch (transformer accessory only)

76.1 mm (3.0 in.) Polypropylene driver with butyl rubber
surround

19.0

mm (0.75 in.)
ABS
Corrosion-resistant, powder-coated aluminum
Screw terminal
Black or white

110.4 mm (4.35 in.)

110.4 mm (4.35 in.)

96.9 mm (3.81 in.)

0.6 kg (1.4 lbs.)

0.9 kg (2.0 lbs.)
One per box
N/A
10-watt transformer (AC-SM31-XFMR), Single gang junction
box mounting plate (AC-SM31-MP)
UL 1480 (UEAY) approved (SM31-EZ and transformer)
Approved
Approved
Transformer Taps

10 W 95.0 dB
5 W 92.0 dB

2.5 W 89.0 dB

1.3 W 86.0 dB

1.3 W 86.0 dB

0.7 W 83.5 dB

0.4 W 81.0 dB

0.2 W 78.0 dB

0.1 W 75.0 dB

Key Features

• Two models are available, the SM31-EZ
and the SM31-EZ-T. The laer includes a
10-wa transformer.

• One 3 inch (76.1 mm) polypropylene
driver with butyl rubber surr o und

• Weatherized components for indoor/out­door applications.

• The- and corrosion-resistant mounting
mecha nism 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).

ive position selecta ble tap switch (SM31-

• F
EZ-T only)

• Corrosion-resistant, powder-coated alumi­num grille.

• UL 1480 (UEAY) approved.

• High quality black or white paint finish.

• Optional accessories: the SM31-EZ-T

includes a 10-wa transformer (AC­31-XFMR) that incorporates a 5 position
tap switch and a wall plate for installa­tion in a single-gang deep junction box.
This transformer kit is also available as an
optional accessory.

Description

The SM31-EZ(-T) is a premium full-range
3 inch surface-mount speaker, with overall

dimensions smaller than a 4 inch sphere.
The SM31-EZ(-T) incorporates a proprietary
aachment with indexed swivel-joint for
complete hemispherical aiming. Components
have been weatherized for indoor/outdoor
applications.

The SM31-EZ is an 8 ohm speaker without
transformer. The SM31-EZ-T is shipped with
the AC-SM31-XFMR transformer module to
add a 20W transf

ormer and 5 position tap
switch that mounts into a single-gang deep
junction box.

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 seing where full-range
intelligibility, unobtrusive design and ins tal­lation ease are paramount. For additional
bass response down to 41 Hz (- 10 dB), the
SM1001p powered 10-inch subwoofer may be
incorporated.

© 2012 SoundTube Entertainment. All rights reserved. SM31-EZ REV 02.14.12

SM31-EZ(-T)

Surface-Mount Speaker

Technical Information for System Engineers

Patented SoundTube
Technologies

SoundTube Entertainment and the
MSE Audio Group constantly develop
new technologies which enhance audio
product performance. SoundTube Enter­tainment innovations are protect ed by
multiple U.S. and international patents,
which explicitly cover SoundTube dome,
enclosure and dispersion technologies.
The MSE Audio Group actively defends
its patents in order to protect SoundTube
resellers and end-users.

Technical Data and
Specification Tools

Technical Data

SoundTube Entertainment strives to
provide complete and effective technical
information and data to dealers, engi­neers and designers. All data are avail­able from SoundTube Entertainme nt or at
www.soundtube.com.

Technical data and downloads include:

EASE™ data – 3-D polar plots.

EASE™ Address – 2-D modeling for dis­tributed systems

Autodesk® Revit® soware

Tech Sheets – Technical infor mation and
architectural specs for system engineers

SoundTubeSPEC™ – Pro
placement soware

Acquisition and Verification

All data for Sou ndTube speakers are
independently collected from and veri­fied by NWAA Labs (www.nwaalabs.
com) using their proprietary MACH
testing system. All data are collected and
analyzed according to ASTM, ISO and
AES standards using EASERA, TEF and
MLSSA. Full balloon data including both
phase and magnitude is compiled into
a variet y of formats including EASE 4.x,
GLL and CLF.

prietary speaker

Architectural Specifications

The loudspeaker transducer shall
consist of one full-range 76.2 mm (3.0 in.)
polypropylene cone with butyl rubber sur­round. The low-frequency voice coil diam-

eter shall be 19.0 mm (0.75 in.).

Performance specifications for a typi­cal production unit shall be as follows:
Useable frequency response shall extend
from 120 Hz – 22 kHz (- 10 dB). Measured
sensitivity (2.83 volt input, 1 meter) shall
be at least 85.0 dB. The speaker shall have
a nominal impedance of 8 ohms, with an
optional 10-wa transformer (AC-SM31­XFMR) for distributed systems. The
optional transformer shall have a five-posi­tion tap switch for 25-, 70.
applications. Rated power capacity shall
be at least 20 was continuous (RMS) and
conform to EIA-426-B. Maximum continu­ous power output at 1 meter shall be 98.0
dB.

Surface-mount installation for the unit
is designed to mount to wall, ceiling or
other rigid structure. When the optional
20-wa transformer is incorporated,
mounting shall be to a single-gang deep
junction box. Vertical and horizontal pivot­ing shall be employed to offer unlimited
aiming capability for indoor and outdoor
applications. Installation for the speaker
shall be by proprietary and corrosion-resis­tant ball mount with an indexed swivel­joint for precision aiming.

External wiring shall be by low-profile
screw terminal and shall accept from 10
– 22-gauge wire. The system shall be for
indoor/outdoor applications.

The enclosure shall be constructed of
injection-molded, ABS. The grille shall be
constructed of powder-coated alu
for lasting performance and affix to the
speaker baffle via pressure fit. Overall
cabinet dimensions shall be no more than

110.4 mm (4.35 in.) in height by 110.4 mm
(4.35 in.) in width by 96.9 mm (3.81 in.) in
depth including the mounting bracket.

The system shall be the SM31-EZ for
low-impedance applications or the SM31­EZ-T for high-impedance applications.

7- and 100-volt

minum

SoundTube Entertainment

6430 North Business Park Loop
Park City, Utah 84098
Phone [phone]
Fax [phone]
Toll Free 800.647.TUBE
www.soundtube.com

All SoundTube products come
with a 5-year limited warranty.