Extron electronics SI 28, SI 26 User Manual

User’s Guide

Surface Mount Speakers

68-1164-01

Rev. A

11 06

SI 26 and SI 28

SI 26 and SI 28 Speakers • Packaging

Packaging Information

P
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X-XX

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1

In

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6W

C

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iling Spe

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Thick Single Wall
Packing

Bottom Foam

Speakers

(each plastic
wrapped)

Allen Hex Tool
(plastic wrapped)

Top Foam

Product Label

Wall Mount
Assemblies

i

Figure 1 — SI 26 and SI 28 speaker packaging details

SI 26 and SI 28 Speakers • Introduction

1

About the SI 26 and SI 28 Speakers

The Extron System INTEGRATOR® SI 26 and SI 28 two-way surface
mount speakers are ideally suited for classrooms, conference
rooms, and boardrooms. With a weather resistant construction,
they are also suitable for outdoor environments.

• SI 26 features a 6.5" long-throw woofer, 1" tweeter, 150 watts
continuous program capacity, and frequency response from
70 Hz to 20 kHz.

• SI 28 features an 8" long-throw woofer, 1" tweeter, 180 watts
continuous program capacity, and frequency response from
50 Hz to 20 kHz.

Figure 2 — Extron SI surface speakers

N Referring to packaging information for location,

carefully remove and check contents before installation.

N Extron recommends that the wiring installation is

performed by a professional audio equipment installer.

C

Use cable clamps to hold the cables in place for

strain relief. Trim back/insulate exposed cable
shields with heat shrink to reduce the chance of
short circuits.

N For Troubleshooting Tips see pages 10 and 11.

N For Service Access see page 10.

Introduction

SI 26 and SI 28 Speakers • Features

2

Features

Dimensions: SI 26: 13.0" H x 8.5" W x 6.75" D

(33.0 cm H x 21.6 cm W x 17.1 cm D)
SI 28: 16.5" H x 11.5" W x 8.6" D
(41.9 cm H x 29.2 cm W x 21.9 cm D)

a

Dual tuned bass reflex ports

b

1" ferrofluid-cooled, aluminum dome tweeter

c

Front locking access (allows for speaker position adjustment)

d

6.5" (SI 26) or 8" (SI 28) long-throw woofer

e

Grill and enclosure may be painted to match environment

f

Weather resistant construction

g

Push down spring terminals

h

Wall mount assembly with unique V-Lock™ (Patent Pending)

system included

i

Back cover for use when speakers are not wall mounted

j

Allen hex tool

k

Extron logo (fits in grill to cover locking port access)

l

Front grill retaining screws (2)

• 8 ohm nominal impedance

• 75 watts (SI 26) or 90 watts (SI 28) continuous pink noise

• 150 watts (SI 26) or 180 watts (SI 28) continuous program

• Internal driver overload protection circuit

1

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4

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11

12

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8

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Figure 3 — Speaker Features

Installation

Installing the SI 26 or SI 28 Speaker

The SI 26 or SI 28 can be mounted on a surface, such as a wall
or post, or mounted in a bookcase, or under a shelf, and can be
used with any Extron product with power amps.

Extron
SI 28

Surface-mount Speakers

Figure 4 — Surface speaker application

Desk top or bookshelf applications

1. For quick installation on a desk top or bookshelf, simply
place on a desk, shelf or other flat surfaces as desired.

2. Route the speaker wire (Extron recommends using
12-18 AWG) to the speakers.

3. Strip the wire and connect the speakers as described in
"Wiring the SI 26 and 28 speakers" on page 8.

Wall mounting applications

Installing the wall mount assembly

N

Before starting installation ensure that the wall and wall

material is capable of supporting the combined weight of
the speakers and the wall mount assemblies.

1. If mounting to drywall, use a stud locator to locate the
studs in the wall. Mark their position.

2. Remove the wall mount assembly from the box and
loosen the hex cap screw (turning it counter clockwise)
with the allen hex tool supplied. Rotate the front section
approximately 90 degrees to the rear mounting plate, as

3

SI 26 and SI 28 Speakers • Installation