Sound Tube SM31-EZ Configuration guide

Do not spec or install speaker near support beam, ventilation duct or
other structure that may interfere with speaker function or dispersion.
Warning Warning
SoundTube speakers must be installed by a professional audio installer/contractor. For safety and for
optimum audio performance, installer must follow all directions issued by SoundTube Entertainment.
Mounting bracket
Speaker
Box contents
1 Speaker
Optional accessories
The SM31-EZ has 2 optional
accessories: a junction box
mounting plate (AC-SM31-MP)
and a junction box mounting
plate with a transformer
(AC-SM31-XFMR).
©2010 SoundTube Entertainment,Inc. All rights reserved. PN INS-SM31-EZ Rev 05.10.10
Install Instructions For:
SM31-EZ speaker
SM31-EZ

1. Unpack speaker.
5. Attach speaker to surface
using installer-supplied
fasteners.
6. Aim speaker by pointing it
up or down and/or rotating
it.
3b. If mounting speaker
offset from wiring point, run
wire out hole in wall and
behind base plate through 2
mm standoff gap between
base plate and wall.
Standoff gap accepts up to
18-gauge flat signal wire.
4. Choose a secure
mounting surface with
sufficient strength to reliably
hold the speaker.
3a. If mounting speaker
directly over wire, ensure
base plate covers hole in
wall.
7. Done!
2. Connect speaker wire
leads to terminal screws on
back of base plate. Polarity
is indicated
SM31-EZ Installation Instructions For:
SM31-EZ speaker
1.435.647.9555 |800.647.TUBE | www.soundtube.com

Do not spec or install speaker near support beam, ventilation duct or
other structure that may interfere with speaker function or dispersion.
Warning Warning
SoundTube speakers must be installed by a professional audio installer/contractor. For safety and for
optimum audio performance, installer must follow all directions issued by SoundTube Entertainment.
Single-gang junction box
(NOT INCLUDED)
Transformer module
Speaker fasteners
Wall plate fasteners
***Junction Box Requirements***
Minimum 2.5-inch deep, single-gang, new construction junction box required.
Unit will NOT fit in retrofit-style junction box.
SoundTube recommends testing fit before installing junction boxes.
Box contents
1 Transformer module
2 Fasteners for speaker to wall plate
2 Fasteners for wall plate to junction box
©2010 SoundTube Entertainment,Inc.Allrightsreserved. INS-SM31-XFMR Rev 05.21.10
Install Instructions For:
AC-SM31-XFMR transformer option
AC-SM31-XFMR Transformer

6. Aim speaker by moving it
up or down or rotating it.
4. The base plate is keyed
to ensure proper polarity. Be
sure smaller color-coded
post on rear of SM31
connects to color-coded
polarity key on wall plate.
Both are marked for easy
identification.
1. Attach signal wire to
terminal strip. Terminal strip
can accommodate
additional wires for daisy
chaining.
2. To set tap before
installation, turn switch from
behind cover plate until
desired setting shows
through window on front of
cover plate. (See step 2a for
tap settings.) Tap switch is
preset to the maximum tap
setting in the 70.7-volt
mode. To adjust tap setting
after installation, see step 7.
Tap 70.7 v 100 v 25 v
5 0.7w 1.3w 0.1w
4 1.3w 2.5w 0.2w
3 2.5w 5w 0.4w
2 5w 10w 0.7w
1 10w X 1.3w
2a. Tap settings. 3. Install the AC-SM31-XFMR
into the installer-supplied
junction box using included
fasteners.
Note: AC-SM31-XMFR will only
fit into a 2.5-inch deep,
single-gang, new construction
junction box. It will NOT fit in
retrofit-style junction box.
7. To adjust the tap setting
after installation, slip a small
flathead screwdriver through
the “window” on the cover
plate and rotate dial to
desired position. Reference
step 2a for tap settings.
8. Done!
5. Attach speaker to
transformer module with
supplied fasteners. No
wiring is necessary because
signal wire contact is made
when speaker is screwed in
place.
AC-SM31-XFMR Transformer Installation InstructionsFor:
AC-SM31-XFMR transformer option
1.435.647.9555 |800.647.TUBE | www.soundtube.com