RBH Sound Speaker SI 744 User Guide

SI-744  
IN-WALL SURROUND SPEAKER  
O w n e r ’ s M a n u a l  
 
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.  
1
 
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
 
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).  
3
 
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
 
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
 
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
 
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  
7
 
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.  
 
 
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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