SI-744
IN-WALL SURROUND SPEAKER
O w n e r ’ s M a n u a l
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Introduction
Congratulations on your purchase of the RBH Sound SI-744 In-wall Surround speaker! Your
speaker is the result of many years of research and development dedicated to producing
high quality products for home audio and audio/video systems.
This manual contains features, setup recommendations and specifications for RBH Sound
SI-744 In-wall Surround speaker. It is recommended you thoroughly read through the
material contained in this manual before installing or connecting your speaker. This
will ensure you have a good understanding of how to setup your speaker for optimum
performance and allow for years of listening enjoyment.
The SI-744 employs four proprietary 4-inch high performance metal cone woofers with
neodymium magnets and two 1-inch silk dome tweeters for excellent performance and
crystal clear sonic accuracy. True to RBH Sound tradition, the SI-744 is timbre-matched to
the rest of the Signature Series in-wall and freestanding speakers.
The SI-744’s design places two of the woofers and one tweeter on a 45-degree angle
towards the screen, while the other two woofers and tweeter point on a 45-degree angle
towards the rear of the theater. This 90-degree angle opposing design, combined with
the SI-744’s dual- or single-channel wiring capability, presents a unique surround sound
solution. When integrated into the rear sides of a home theater system and wired in dual-
channel mode, the SI-744’s front-firing drivers can play side surround channel audio and
the rear-firing drivers can play rear surround channel audio. This configuration provides all
four surround channels in a 7.1-channel surround sound system from one pair of SI-744s.
When wired in single-channel mode, the SI-744 presents its listeners with a bi-polar
dispersed sound field for increased surround coverage.
As with other RBH Sound Signature Series In-wall models, the SI-744 features its own
tuned enclosure to provide an optimized environment for the speaker and prevent
unwanted cabinet resonance. The enclosure also boasts an integrated metal drywall cut-
out ring and is designed to be installed into a standard stud-framed wall prior to drywall
during new construction or renovation. The SI-744’s baffle fits snugly into the area left
over after the drywall is finished and is flush to the wall when complete.
Break In Period
Allow several hours of listening time to adequately break-in the speakers. As the speakers
break-in, the driver suspension will loosen. The result of break-in will be an increase in
low frequency response, improved definition, and increased clarity and detail.
Speaker Placement
In order to obtain the best possible sound from your speaker system, it is important to
determine where the speakers will sound best in your listening room. Room reflections
from the floor, ceiling and side walls influence the balance, imaging and overall sonic
quality at the listening position. Experiment with speaker placement to determine which
location offers the best overall sound.
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Speaker Placement (continued)
Front Main Speakers
As a starting point, place your left and right speakers at least 7-feet apart from each
other. The distance from the listening position to each speaker should be close to the
distance that separates the two main speakers.
Center Channel Speaker
The Center Channel Speaker should be placed between both left and right main speakers.
Often this positioning dictates placing the speaker either directly above or below a
television monitor. Since some RBH Signature Series speakers are available with video
shielding, the center speaker may be placed in close proximity to a CRT-type television
without cause for concern.
Surround Speakers
The SI-744 is a dedicated surround speaker. This speaker should ideally be placed slightly
behind the listening position on the side walls, regardless of whether it is being used in
single or dual mode. Optimally, there will also be a back wall for the sound to reflect off of
to come back to the listening position. An optional set of SI-744’s can be used on the back
wall as shown in the diagram below. When using two pair, it is recommended that both
pair be used in the single-channel mode.
Subwoofer
Placement of the subwoofer will largely determine quality, quantity, and extension of
the bass frequencies within your listening room. Bass frequencies are reinforced by
close room boundaries. Placing the subwoofer in a corner will make the subwoofer sound
louder and boost
the very lowest
frequencies. Placing
the subwoofer away
from walls will
provide the least
reinforcement,
making the bass
sound subjectively
thinner than if the
woofer were close to
a wall. Good results
can usually be
obtained by placing
a subwoofer along a
wall 1-3 feet from a
corner. Experiment
with subwoofer
placement and
the sub-amplifier
controls to achieve
the proper bass
balance.
2
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Speaker Placement (continued)
It is important for the
SI-744 speaker to be
positioned correctly, if not
placed properly there will be
a great reduction in imaging,
sound staging and overall
performance of the speaker.
Refer to this illustration for
position of the right and left
speakers. The top tweeter
should aim towards the front
of the theater.
Left Speaker
Right Speaker
Pre-wiring the Speaker
1. Unpack the speaker cabinet from the shipping box.
2. Run the speaker wires from the terminal cup to an amplifier/receiver. Choose either the
default dual channel setup in Wiring Diagram 1 (page 4) or the optional full-speaker
setup shown in Wiring Diagram 2 (page 5).
NOTE: The single-channel operation as shown in Wiring Diagram 2 (page 5), the
crossover switch must be toggled to the left.
Untape and flip the switch for setup as a single-channel speaker
for use in a 5.1 Home Theater (see Wiring Diagram 2 on page 5).
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Pre-wiring the Speaker (continued)
Terminal Cup
Amplifier/Receiver
NOTE: Follow this
diagram for dual
mode operation.
This example uses
the left channel.
Connect the left
surround channel
output from the
amplifier to the
left surround input of the
terminal cup. Connect the
surround back output from
the amplifier to the rear
Terminal Cup
input of the terminal cup.
Repeat for the right channel.
Left
Surround
Left
Rear
Left
Surround
SI-744 Baffle Back View
SI-744 Enclosure Front View
Wiring Diagram 1. Dual-channel operation.
4
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Pre-wiring the Speaker (continued)
Terminal Cup
Amplifier/Receiver
NOTE: Follow this diagram
for single mode operation,
the example uses the
left channel. Connect
the left surround channel
output from the amplifier
to either set on inputs at
the terminal cup. Be sure
to untape and flip the switch on the
crossover to single mode operation
(see illustration on page 3).
Repeat for the right speaker.
Terminal Cup
Left
Surround
Left
Rear
Left
Surround
SI-744 Baffle Back View
SI-744 Enclosure Front View
Wiring Diagram 2. Single-channel operation (bi-polar).
5
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Installing the Speaker
1. Determine where each speaker cabinet will need
to be installed.
Left Surround
2. If the cabinet is installed in a vertical position,
the terminal cup will need to be on the top
(see figure 1).
3. Position and brace the speaker cabinet in-
between two studs by using a couple of
screws to hold the speaker in place
(see figure 2).
Left Rear
Figure 1
NOTE: The front of the cabinet should be flush
with the front of the studs.
4. Using the included wood screws, secure both
sides of the speaker as shown in figure 3.
Use a minimum of three screws per side to
secure the cabinet.
OPTIONAL: Use construction adhesive between
the speaker cabinet and studs to secure the
speaker in place.
Figure 2
Figure 3
Figure 4
6. Connect speaker wire to the terminal plate.
7. If the cardboard debris shield was removed
during the process of installing the speaker
wire, replace it (see figure 4).
8. With the speaker wire ran and the cabinet
secured between the studs the drywall can
now be installed.
IMPORTANT: To avoid vibrations between the
drywall and the speaker cabinet use construction
adhesive and adhere the drywall to the speaker
cabinet and studs for stability.
6
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Specifications
Model:
SI-744
System Type:
In-wall Surround Speaker
70Hz-20kHz 3dB
Frequency Response:
Sensitivity:
88/91dB (2.83V @ 1 Meter)
Recommended Power: 75-150 Watts
Woofers:
Tweeters:
Four 4” (102mm) Aluminum Cone
Two 1” (25mm) Silk Dome
Crossover Frequencies: 2,700Hz
Crossover Slope:
Impedance:
12dB/Octave
4 Ohms Combined, 8 Ohms per Channel
Medium Density Fiberboard (MDF)
Black
Cabinet Material:
Cabinet Finish:
Baffle and Grille:
Baffle Black; Grille Black or White.
Enclosure sold separately.
Cutout Dimensions:
Baffle: 9-5/8” W x 20-1/4” H
(245mm W x 514mm H)
Finished Dimensions: 14” W x 27-1/2” H x 3-1/2” D
(356mm W x 699mm H x 89mm D)
Weight:
40 lbs. (18.14 Kg)
Troubleshooting
Situation:
Probable Cause:
Solution:
No sound from
speakers
Speaker wire not
connected
Make sure wire is connected at
both the speaker and the ampli-
fier observing proper polarity
No sound from
one speaker
Speaker selector on
amplifier is not on
Activate proper selector on
amplifier
Balance control on receiver
or pre-amp is not centered
Place balance control in the
center
Speaker wire not
securely connected
Check all connections at amplifier
and speakers
Very little bass
and/or imaging
Speakers are wired
out of phase
Check entire system for proper
polarity and make adjustments
as necessary
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Warranty
Your RBH Sound SI-744 in-wall surround speaker is covered by a limited warranty against
defects in materials and workmanship for a period of 5 (five) years from the original
date of purchase. This warranty is provided by the authorized RBH Sound dealer where
the speaker was purchased. Warranty repair will be performed only when your purchase
receipt is presented as proof of ownership and date of purchase. Defective parts will be
repaired or replaced without charge by your dealer’s store or the location designated by
RBH Sound authorized to service RBH Sound products. Charges for unauthorized service
and transportation cost are not reimbursable under this warranty. This warranty becomes
void if the product has been damaged by alteration, misuse or neglect. RBH Sound
assumes no liability for property damage or any other incidental or consequential damage
whatsoever which may result from the failure of this product. Any and all warranties of
merchantability and fitness implied by law are limited to the duration of this express
warranty. Some states do not allow limitations on how long an implied warranty lasts,
so the above limitations may not apply to you. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion
may not apply to you.
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TM
Redefining The Way You Experience Sound.
382 Marshall Way, Layton, Utah • USA • 84041
Toll Free: (800) 543-2205 • Fax: (801) 543-3300
It is RBH Sound policy to continuously incorporate improvements into products; all specifications are subject to change without notice.
Copyright 2010 RBH Sound. All Rights Reserved.
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