Other products by SoundTube
(Tech Support Website)

Item #: SM31EZBK
MSRP: $110.00

SM31EZBK SoundTube Surface-Mount Speaker

The SM31-EZ(-T) is a premium full-rang 3 inch surface-mount 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.


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 transformer and 5 position tap switch that mounts into a single-gang deep


Key Features


-Two models are available, the SM31-EZ
and the SM31-EZ-T. The latter includes a
20-watt transformer.


-One 3 inch (76.1 mm) polypropylene
driver with butyl rubber surround
-Weatherized components for indoor/outdoor


-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 (SM31-
EZ-T only)


-Corrosion-resistant, powder-coated aluminum

-UL 1480 (UEAY) approved.


- High quality black or white paint finish.


-Optional accessories: the SM31-EZ-T
includes a 20-watt transformer (AC-
31-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


Prop 65WARNING: This product contains chemicals including Styrene which is known to the state of California to cause cancer, and Bisphenol A (BPA), which is known to the state of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

In certain instances promotional prices will be offered listed above as a “Price with Rebate”, and are typically dated. In these cases Instant Rebate (IR) pricing is good sometimes only for the day only or only for the week. In order to be eligible for IR pricing – the order must be paid for AND picked up/shipped out. If you are placing an online order outside of business hours within your respective time zone, please add a note to your order for the team to confirm the pricing, or contact the branch the following business day to ensure that the item pricing carries over into the subsequent period. If an alternate branch location is still open in another time zone, please reach out to that group.

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